Outdoor Research Alpine Ascentshell Bivy - Moosejaw
Fun Rules and Info about the Moosejaw Bonus Card thing:

  • The Bonus Card can be used like a regular Gift Card for multiple redemptions on Moosejaw.com or in Moosejaw shops before 1/29/2024.
  • Any remaining balance on 1/30/2024 will be canceled (that's why we call it a "Bonus" Gift Card).
  • Use code BONUSCARD during checkout to get the deal, the Bonus Card will be added to your cart. Orders with multiple qualifying items will receive multiple Bonus Cards.
  • Each item over $99 gets a $20 Bonus Card, over $149 gets a $30 Bonus Card, over $199 gets a $40 Bonus Card, over $249 gets a $50 Bonus Card, and over $499 gets a $100 Bonus Card.
  • The Bonus Cards will be emailed to you after your order ships. Please blame MMB.
  • If you return an item that included a free Bonus Card, we will deduct any used amount of the Bonus Card from your credit. Sorry to be so mean about it.
  • Qualifying item value is after any other applicable discounts and before tax and shipping charges.
  • The deal cannot be combined with other promos, is good for in-stock items only, and cannot be applied to prior purchases. Exclusions may apply.
  • Someone told me to tell you use this card like cash. Cannot be replaced if lost or stolen. Not redeemable for cash or credit.
  • The deal is good 11/28/2023 - 12/10/2023.
  • Offer is subject to change without prior notice.

About this whole 40% Off Select Carhartt Hoodies thing:

  • Applies to select styles only.
  • The deal is not good on previous purchases or out of stock items.
  • Exclusions may apply.
  • Offer subject to change at any time.

FREE Shipping Offers:

Bike Shipping Info and Offers:

  • Get FREE 4-6 Day Ground Shipping on all bike accessory orders over $49.00.
  • Complete bikes will ship 4-6 Day for $4.95
Outdoor Research Alpine Ascentshell Bivy
Wishlist Icon

Outdoor Research Alpine Ascentshell Bivy

Outdoor Research Alpine Ascentshell Bivy is rated 3.6 out of 5 by 9.
  • y_2023, m_12, d_3, h_7
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.37
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_9
  • loc_en_US, sid_10560657, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_moosejaw
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getAggregateRating, 4ms
3.6 Star Rating
+ earn up to $29.90 in Rewards Dollars
Select a Size
Please select a size
Select a Color
Please select a color
Some items available for immediate pickup Select Store
Size Guide
Some items available for immediate pickup Select Store
Special order items take longer to ship

We want to make extra-sure you realize that you've added a special order item to your cart. These items take a little longer to get to you because we have to order from the manufacturer first. The "Est. Ship Date" is the date we expect items to leave our warehouse... so add your chosen shipping speed to see when it will show up at your door.

	{"features":[{"geometry":{"coordinates":[-105.255852,40.01889],"type":"Point"},"properties":{"Address":"1750 29th Street, Unit 1042, Boulder, CO 80301","AddressLines":{"city":"Boulder","country":"US","line1":"1750 29th Street","line2":"Unit 1042","state":"CO","zipcode":"80301"},"category":"storefront","closingHours":{"friday":"19","monday":"19","saturday":"19","sunday":"18","thursday":"19","tuesday":"19","wednesday":"19"},"description":"Moosejaw Storefront","ffmcId":"10064","hours":"Mon - Sat: 11am - 6pm Sun: 12pm - 6pm","name":"Boulder","phone":"(720) 452-2432","RBStoreId":"010","storeid":"01"},"type":"Feature"},{"geometry":{"coordinates":[-83.748237,42.278766],"type":"Point"},"properties":{"Address":"327 S Main Street, Ann Arbor, MI 48104","AddressLines":{"city":"Ann Arbor","country":"US","line1":"327 S Main Street","line2":"","state":"MI","zipcode":"48104"},"category":"storefront","closingHours":{"friday":"19","monday":"19","saturday":"19","sunday":"18","thursday":"19","tuesday":"19","wednesday":"19"},"description":"Moosejaw Storefront","ffmcId":"10056","hours":"Mon - Sat: 11am - 6pm Sun: 12pm - 6pm","name":"Ann Arbor","phone":"(734) 769-1590","RBStoreId":"007","storeid":"02"},"type":"Feature"},{"geometry":{"coordinates":[-83.208229,42.541477],"type":"Point"},"properties":{"Address":"34288 Woodward Ave, Birmingham, MI 48009","AddressLines":{"city":"Birmingham","country":"US","line1":"34288 Woodward Ave","line2":"","state":"MI","zipcode":"48009"},"category":"storefront","closingHours":{"friday":"19","monday":"19","saturday":"19","sunday":"18","thursday":"19","tuesday":"19","wednesday":"19"},"description":"Moosejaw Storefront","ffmcId":"10052","hours":"Mon - Sat: 11am - 6pm Sun: 12pm - 6pm","name":"Birmingham","phone":"(248) 203-7777","RBStoreId":"001","storeid":"03"},"type":"Feature"},{"geometry":{"coordinates":[-87.655949,41.915706],"type":"Point"},"properties":{"Address":"1901 North Clybourn, Chicago, IL 60614","AddressLines":{"city":"Chicago","country":"US","line1":"1901 North Clybourn","line2":"","state":"IL","zipcode":"60614"},"category":"storefront","closingHours":{"friday":"19","monday":"19","saturday":"19","sunday":"18","thursday":"19","tuesday":"19","wednesday":"19"},"description":"Moosejaw Storefront","ffmcId":"10054","hours":"Mon - Sat: 11am - 6pm Sun: 12pm - 6pm","name":"Chicago","phone":"(773) 529-1111","RBStoreId":"003","storeid":"04"},"type":"Feature"},{"geometry":{"coordinates":[-83.048827,42.333791],"type":"Point"},"properties":{"Address":"1275 Woodward Ave, Detroit, MI 48226","AddressLines":{"city":"Detroit","country":"US","line1":"1275 Woodward Ave","line2":"","state":"MI","zipcode":"48226"},"category":"storefront","closingHours":{"friday":"19","monday":"19","saturday":"19","sunday":"18","thursday":"19","tuesday":"19","wednesday":"19"},"description":"Moosejaw Storefront","ffmcId":"14608","hours":"Mon - Sat: 11am - 6pm Sun: 12pm - 6pm","name":"Detroit","phone":"(313) 338-3661","RBStoreId":"014","storeid":"05"},"type":"Feature"},{"geometry":{"coordinates":[-84.477334,42.733485],"type":"Point"},"properties":{"Address":"555 E Grand River Ave, East Lansing, MI 48823","AddressLines":{"city":"East Lansing","country":"US","line1":"555 E Grand River Ave","line2":"","state":"MI","zipcode":"48823"},"category":"storefront","closingHours":{"friday":"19","monday":"19","saturday":"19","sunday":"18","thursday":"19","tuesday":"19","wednesday":"19"},"description":"Moosejaw Storefront","ffmcId":"10051","hours":"Mon - Sat: 11am - 6pm Sun: 12pm - 6pm","name":"East Lansing","phone":"(517) 333-4000","RBStoreId":"000","storeid":"06"},"type":"Feature"},{"geometry":{"coordinates":[-85.669997,42.955232],"type":"Point"},"properties":{"Address":"410 Ionia Ave SW, Grand Rapids, MI 49503","AddressLines":{"city":"Grand Rapids","country":"US","line1":"410 Ionia Ave SW","line2":"","state":"MI","zipcode":"49503"},"category":"storefront","closingHours":{"friday":"19","monday":"19","saturday":"19","sunday":"18","thursday":"19","tuesday":"19","wednesday":"19"},"description":"Moosejaw Storefront","ffmcId":"15608","hours":"Mon - Sat: 11am - 6pm Sun: 12pm - 6pm","name":"Grand Rapids","phone":"(616) 570-0135","RBStoreId":"015","storeid":"07"},"type":"Feature"},{"geometry":{"coordinates":[-82.916142,42.390324],"type":"Point"},"properties":{"Address":"17037 Kercheval, Grosse Pointe, MI 48230","AddressLines":{"city":"Grosse Pointe","country":"US","line1":"17037 Kercheval","line2":"","state":"MI","zipcode":"48230"},"category":"storefront","closingHours":{"friday":"19","monday":"19","saturday":"19","sunday":"18","thursday":"19","tuesday":"19","wednesday":"19"},"description":"Moosejaw Storefront","ffmcId":"10053","hours":"Mon - Sat: 11am - 6pm Sun: 12pm - 6pm","name":"Grosse Pointe","phone":"(313) 881-9999","RBStoreId":"002","storeid":"08"},"type":"Feature"},{"geometry":{"coordinates":[-94.592791,39.042297],"type":"Point"},"properties":{"Address":"439 W 47th Street, Kansas City, MO 64112","AddressLines":{"city":"Kansas City","country":"US","line1":"439 W 47th Street","line2":"","state":"MO","zipcode":"64112"},"category":"storefront","closingHours":{"friday":"19","monday":"19","saturday":"19","sunday":"18","thursday":"19","tuesday":"19","wednesday":"19"},"description":"Moosejaw Storefront","ffmcId":"10065","hours":"Mon - Sat: 11am - 6pm Sun: 12pm - 6pm","name":"Kansas City","phone":"(816) 832-4493","RBStoreId":"011","storeid":"09"},"type":"Feature"},{"geometry":{"coordinates":[-83.2169984,42.5467069],"type":"Point"},"properties":{"Address":"284 West Maple Rd, Birmingham, MI 48009","AddressLines":{"city":"Birmingham","country":"US","line1":"284 West Maple Rd","line2":"","state":"MI","zipcode":"48009"},"category":"storefront","closingHours":{"friday":"19","monday":"19","saturday":"19","sunday":"18","thursday":"19","tuesday":"19","wednesday":"19"},"description":"Moosejaw Storefront","ffmcId":"17108","hours":"Mon - Sat: 11am - 6pm Sun: 12pm - 6pm","name":"Birmingham Bike and Snow","phone":"(248) 212-0565","RBStoreId":"022","storeid":"11"},"type":"Feature"},{"geometry":{"coordinates":[-94.2087133,36.3719108],"type":"Point"},"properties":{"Address":"111 South Main Street, Bentonville, AR 72712","AddressLines":{"city":"Bentonville","country":"US","line1":"111 South Main Street","line2":"","state":"AR","zipcode":"72712"},"category":"storefront","closingHours":{"friday":"21","monday":"21","saturday":"21","sunday":"18","thursday":"21","tuesday":"21","wednesday":"21"},"description":"Moosejaw Storefront","ffmcId":"715845991","hours":"Mon - Sat: 10am - 8pm Sun: 11am - 6pm","name":"Bentonville","phone":"(479) 265-9245","RBStoreId":"025","storeid":"12"},"type":"Feature"},{"geometry":{"coordinates":[-94.7955,38.89087],"type":"Point"},"properties":{"Address":"686 N Central Street, Olathe, KS 66061","AddressLines":{"city":"Olathe","country":"US","line1":"686 N Central Street","line2":"","state":"KS","zipcode":"66061"},"category":"storefront","closingHours":{"friday":"21","monday":"21","saturday":"21","sunday":"18","thursday":"21","tuesday":"21","wednesday":"21"},"description":"Moosejaw Storefront","ffmcId":"17109","hours":"Mon - Sat: 10am - 8pm Sun: 11am - 6pm","name":"Olathe","phone":"(913) 203-4189","RBStoreId":"023","storeid":"13"},"type":"Feature"},{"geometry":{"coordinates":[-85.5014,43.0543],"type":"Point"},"properties":{"Address":"6800 Cannonsburg Rd NE, Belmont, MI 49306","AddressLines":{"city":"Belmont","country":"US","line1":"6800 Cannonsburg Rd NE","line2":"","state":"MI","zipcode":"49306"},"category":"storefront","closingHours":{"friday":"20","monday":"20","saturday":"21","sunday":"18","thursday":"20","tuesday":"20","wednesday":"20"},"description":"Moosejaw Storefront","ffmcId":"17109","hours":"Mon - Friday: 11am - 8pm Sat: 9am - 9pm Sun: 11am - 6pm","name":"Cannonsburg","phone":"(606) 874-8050","RBStoreId":"027","storeid":"14"},"type":"Feature"},{"geometry":{"coordinates":[-111.8657,40.759063],"type":"Point"},"properties":{"Address":"470 South 900 East, Salt Lake City, UT 84102","AddressLines":{"city":"Salt Lake City","country":"US","line1":"470 South 900 East","line2":"","state":"UT","zipcode":"84102"},"category":"storefront","closingHours":{"friday":"20","monday":"20","saturday":"20","sunday":"18","thursday":"20","tuesday":"20","wednesday":"20"},"description":"Moosejaw Storefront","ffmcId":"715847491","hours":"Mon - Saturday: 10am - 8pm Sun: 11am - 6pm","name":"Salt Lake City","phone":"(801) 994-6818","RBStoreId":"029","storeid":"15"},"type":"Feature"}],"type":"FeatureCollection"}
Free Shipping on this item
Add to Cart

Delivery: FREE

-- Get it by: Select Size/Color

to most locations

Delivery: Unavailable

Sorry, this product is only available in select stores

Store Pickup: FREE

-- Get it by:  

Store Pickup: Unavailable

Sorry, this product is not available for store pickup

at Moosejaw Stores Change

Ship to Store: FREE

-- Get it by: Select Size/Color

Ship to Store: Unavailable

Sorry, this product is not available for ship to store

at Moosejaw Stores Change

The Outdoor Research Alpine Ascentshell Bivy is a solo shelter for a single hiker. It's lightweight, it's waterproof and windproof so you remain protected as you sleep. The AscentShell x Pertex tech highly increases the breathability, reducing condensation greatly. Tuck your sleeping bag inside, leave the rest of your gear outside, and slip inside for a good night's sleep. There is plenty of head space to keep the cramped feeling low, and the no-see-um mesh offers extra comfort, without the bugs, on drier nights.

Product Description

Item No.   10560657

The Outdoor Research Alpine Ascentshell Bivy is a solo shelter for a single hiker. It's lightweight, it's waterproof and windproof so you remain protected as you sleep. The AscentShell x Pertex tech highly increases the breathability, reducing condensation greatly. Tuck your sleeping bag inside, leave the rest of your gear outside, and slip inside for a good night's sleep. There is plenty of head space to keep the cramped feeling low, and the no-see-um mesh offers extra comfort, without the bugs, on drier nights.

Eco-friendly Materials
Waterproof Materials and Construction

FEATURES of the Outdoor Research Alpine Ascentshell Bivy

  • Waterproof
  • Breathable
  • Ultralight
  • Fully seam-taped
  • Durable
  • No-see-um mesh
  • Single-pole system
  • Two stake loops
  • One guy line loop
  • High volume toe end
  • Extra head room to store gear
  • Large side opening
  • Fly fastener exposes mesh screen
  • Extra large mesh screen for star-gazing

Fabric Details

  • Bluesign approved, ascentshell X pertex shield air diamond fuse 3L 100% Nylon upper
  • 100% Nylon 40D with TPU lamination floor
  • Bluesign approved, 100% Polyester mesh

Product Specifications

Disclaimer: We only ship this brand to US Addresses.
Type of Waterproofing: Fully Seam-Taped
Sleeping Bag Lining: 100% Polyester Mesh
Features: Waterproof, Ultralight, bluesign Approved
Sleeping Bag Shell: 100% Nylon
Sustainability: bluesign Approved
Waterproof: Yes
Eco Friendly: Yes
Best Use: Camping
Pertex Shield

Pertex Shield
Pertex Shield offers balanced wind and water protection and excellent durability due to a breathable microporous waterproof coating. This provides exceptional comfort and reduced condensation.

Product Reviews

Rated 4 out of 5 by from Nice but tight Good concept, but more space on the lower end would make sense - both practical for using a 25" mat or to store some additional equipment. Humidity is not a major problem, but please could you give a Moisture Vapor Transmission Rate for the bivvy? Thank you!
Date published: 2023-10-19
Rated 3 out of 5 by from Some good features, some needs improvement Used it as a minimalist sleeping system in 50F in semi arid Utah. The asymmetrical headroom and zip system seem to work well, bug screen worked great too. Only complaint is the foot room is tight when used together with my 20" wide x2" thick inflatable sleeping pad and sleeping bag. I'm 5'11" and 200 lbs and there's barely any leg room. Description recommends a sleeping pad no wider than 22" but I think it'll work best with a tapered sleeping bag. Hopefully next version would have a little more legroom then it'll be golden.
Date published: 2023-08-06
Rated 5 out of 5 by from Great material [This review was collected as part of a promotion.] This bivy has the protection you need in the size and weight that you want.
Date published: 2023-08-01
Rated 2 out of 5 by from Probably not keeping it This is not a full review, but an initial reaction to what I consider a really poor design. I got this as a replacement for the previous generation of the Helium bivy that I'd had out on several bikepacking adventures in CA from 8k' at freezing to warm summer redwood forest trips. That model had 5 stake out points and I'd used kam snaps to keep the zip-able head portion of the top rolled up for better air circulation. I didn't get bad condensation if I had the proper temp quilt for the climate. I could fit a rectangular Neo Air All Season pad with a 20º down quilt no problem. So I decided to "upgrade" to the Alpine AscentShell bivy, mostly for the new zip style, but calling this an "alpine" bivy is a bit much. I'm 6' 180lb. and my feet would be wrecked in freezing conditions. I'm a side sleeper and even then, crawling into it with that same Neo Air pad and a 40º down bag, there was a lot compression happening. If I were to sleep on my back, my feet would fully compress the down. It also needs more tie down points, like the current Helium. Not sure if the roll top lop can be used to guy up the mid section of the bivy, but if I keep it, I'll consider adding other points with Tenacious Tape and shock cord. Overall, the headspace feels less claustrophobic than the Helium, but there's not pocket like the Helium had. And I must say, it's way easier to get into and out of than the Helium. If you're going with an UL tapered air pad or a foam pad, you'll be alright, but this is definitely a 2-3 season item for anyone north of 5'10". (I've also had the GoreTex Alpine bivy, so I've got some experience with OR's bivy options) Again, this bivy hasn't seen the outside of my house, so no real world experience, but it will probably stay that way.
Date published: 2022-09-29
Rated 3 out of 5 by from Emergency shelter I have this in my 24 hour pack for search and rescue as an emergency shelter. I have slept a couple of nights in it, in alpine conditions in the summer where it drops to about 7 degrees Celsius at night and both times I woke up with lots of condensation inside. You need to fry your sleeping bag and everything inside and this was with the vent opened completely about 1.5 feet, so tons of ventilation. Not much room for extra gear just your cellphone/radio/water etc. I am not sure if I would buy it again and I don't have anyone I would recommend it too but i am glad I have it as back up as it still beats sleeping under a tarp.
Date published: 2022-09-26
Rated 4 out of 5 by from Great Bivy with issues I'm a Bivy Sack fan. The Alpine bivy has been my favorite, other then the entry so I picked up this one, everything about it is great but I got it for extreme conditions/cold weather and it is very tight with a insulated pads depth, I use a full xtherm mat.I'm 5-10, with a full pad your feet get restricted. Make the sac with about 3 more inches of vertical volume please. Also, when you are Biving at 13000 feet on a ridge edge, the 2 attachment loops are questionable when you are not in the sack, it can catch wind underneath and your Entire shelter system cold pull of the mountain when you step out to take a pee In the middle of the night. A lot of potential or good for a petit person in 3 season conditions.
Date published: 2022-09-22
Rated 5 out of 5 by from Insanely Light My new bivy is even lighter than my original auora bivy. Cant believe OR made an even lighter weight waterproof bivy. Customer service is always a 10 with you guys. I will be recommending to friends. Thanks OR
Date published: 2022-08-01
Rated 2 out of 5 by from Could be designed better Fully understanding that this item is for necessity camping on long hikes as a way to reduce weight and not comfort camping, I still have some issues with it. 1.) Its not tall enough to have an thin air mattress in. A closed cell matt is all I would recommend. When sleeping on your side, as I often do, your shoulders touch the mosquito netting and they bite right through it. 2.) It only has 2 anchor points and needs 4. One tent peg at the head and one at the foot. If they come loose/free from tossing and turning the entire tent looses its shape and you have to get out of the sack and re-spike it. i bought this for the JMT and there will be rocky spots with not enough dirt to hold a peg and I am hoping that a pile of rocks will be enough to hold its shape. 3.) It does not come with line/string to anchor the pegs, or pegs themselves. East fix to buy them separately but for the $$$ you think they would include them. 4.) There is no pouch or pocket inside to hold your glasses, phone, head lamp, etc. This forces you to let them float in the tent and I crushed my glasses as a result. Seems like this wouldn't add much weight to sew a pocket in.
Date published: 2022-07-20
  • y_2023, m_12, d_3, h_7
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.37
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_9
  • loc_en_US, sid_10560657, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_moosejaw
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 1ms
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 22ms
  • bvseo-msg: The resource to the URL or file is currently unavailable.;

Size Guide