Free 2-Day Shipping
Get FREE 2-Day on orders over $49!
Free Shipping
Spend $12 in Moosejaw products OR at least $35
in other products and your order ships FREE!
Moosejaw Rewards
You earn MJ$10 for every $100 you spend on Moosejaw.com or at our shops (MJ$2.50 for discounted items). That's like getting 10% back in Rewards!
Rewards Program Terms and Conditions
Last updated January 1st, 2020
Opting-in to Moosejaw Rewards:
All users must accept these terms and conditions and create an account with Moosejaw to opt-in to the program and earn, accrue, retain and redeem Moosejaw Reward Dollars (MJ$). The program is FREE to join and membership is ongoing until or unless the user requests to be removed or is removed due to abuse of the program. Users can opt-in to the program while checking out on Moosejaw.com or at one of our stores or at any time within 30 days of purchase to accrue the MJ$ earned on that purchase. Once opted-in to the program, MJ$ will earn and accrue for redemption as described below until the MJ$ expire or the user leaves the program.
All information collected and used to facilitate the Moosejaw Rewards program is directly related to the program's ability to provide value to the customer. A customer opting-in to the Moosejaw Rewards program is a separate action from establishing a user profile as a result of making a purchase.
The program opt-in requirement was added on August 6th, 2019. Existing program members prior to that date must still formally opt-in and accept the terms and conditions to continue to retain, earn and redeem MJ$. Pre-existing program members that fail to opt-in prior to June 28, 2020 will be removed from the program, and any unused MJ$ will be voided. We really, really don't want to that to happen, so please opt-in or we'll feel terrible.
Leaving Moosejaw Rewards Program:
You may choose to leave the Moosejaw Rewards program at any time by logging in and clicking on the “Opt out Rewards Program” link within the My Account Summary page, Email, calling 877-MOOSEJAW (877-666-7352) or in-store with help from our employees. If you leave the rewards program, any unused MJ$ will be voided upon completion of your request.
Earning MJ$:
All items we sell are eligible with the exception of gift cards or other items specifically noted. Full-priced items earn 10% back while discounted items earn 2.5%. "Discounted items" includes items on sale or discounted via coupon code or use of MJ$. You do not earn MJ$ for shipping or tax charges, only from the item value. MJ$ expire two years after earning and are redeemed on a first-in, first out basis (in other words, we always use your oldest MJ$ that are closest to expiration).
Checking & Redeeming MJ$:
On Moosejaw.com, just sign-in on any page to see your available balance. Once signed in, you will see your available MJ$ and maximum that can be redeemed in the payment section of the checkout process. In stores, provide the email address attached to your account to learn your balance and apply to your purchase. We will also send you a monthly email that details your balance and other account activity. This is a transactional email that you will receive even if you are not subscribed to our marketing emails.
Bonus Rewards Promotions:
Every so often, we'll have special offers where you can earn bonus MJ$, like an additional 10%, 20% or 40% back. So if we are running a 50% back special offer, and you buy a regular-priced item for $100.00, you will receive MJ$10.00 in base points, and a bonus of MJ$40. These special offers may have a cap on how many bonus MJ$ you earn during the promotion, but you will always earn the base Reward Dollars. Make sure to check us out on our social channels for other ways to win some extra MJ$!
MJ$ on Gift Cards:
You don't get earn MJ$ when you buy a gift card, but you do get MJ$ when you spend a gift card. Sorry gift givers. You're welcome gift receivers.
Product Returns and MJ$:
If you return an item, we deduct the MJ$ earned on that item from your balance. If you used the MJ$ and your balance is less than deduction, then your refund is reduced by the difference.
Program Abuse:
The intent of the program is to provide our loyal customers with a way to buy great gear for less. Moosejaw reserves the right to remove any user from the program and zero out their MJ$ balance if Moosejaw determines that the user is abusing the program by buying for resale, attempting to game the program or any other reason at Moosejaw's sole discretion.
Are you Sure?
Our Rewards Program is completely FREE and easy to use.
By opting out, you forfeit all the Moosejaw Rewards Dollars your currently have in your account, which is basically throwing away free money. What would your grandmother say about that? If you're 100% sure, please click "OptOut" below.
Earn 10% back on all full-priced purchases on Moosejaw.com or at our shops (2.5% for discounted items).
The program is FREE. Just register and join during the checkout process. So Easy.
After joining the program, you'll receive your MJ$ as soon as your order ships. Then the next time you shop at Moosejaw, you can redeem those MJ$ to get awesome gear for way less.
"Get it by" - For in-stock and ready to ship items, choose the your shipping speed at checkout to get your items by the "get it by" date. Your items will ship SAME DAY for orders placed before 3pm EST.
"Oversized" - This means the item is large and can only be shipped using 4-6 Day ship speed. Additional shipping charges may apply.
"Freight" - This means the item is too large for standard shipping methods, and must be shipped by truck freight for an additional fee. Someone must be present to inspect, sign, and accept delivery, so we will call you to schedule delivery.
If you have any questions, please Live Chat or call us at 877-666-7352.
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.
The Therm-a-Rest Hyperion 20 UL Sleeping Bag is an ultralight mummy bag designed for backpacking and mountaineering. Compressible down insulation and a tapered mummy shape team up to keep weight and packed size to a minimum. The high-quality 900-fill goose down features hydrophobic Nikwax™ treatment for improved performance in wet or humid environments. Removable sleeping pad straps allow you to integrate your sleep system to boost comfort and thermal efficiency. Boasting a 20°F temperature rating and weighing in at only 20oz for the regular size, this sleeping bag will keep you toasty warm through most 3-season applications without weighing you down.
Products on Sale are Discontinued Styles or Colors.
The Therm-a-Rest Hyperion 20 UL Sleeping Bag is an ultralight mummy bag designed for backpacking and mountaineering. Compressible down insulation and a tapered mummy shape team up to keep weight and packed size to a minimum. The high-quality 900-fill goose down features hydrophobic Nikwax™ treatment for improved performance in wet or humid environments. Removable sleeping pad straps allow you to integrate your sleep system to boost comfort and thermal efficiency. Boasting a 20°F temperature rating and weighing in at only 20oz for the regular size, this sleeping bag will keep you toasty warm through most 3-season applications without weighing you down.
Products on Sale are Discontinued Styles or Colors.
FEATURES of the Therm-a-Rest Hyperion 20 UL Sleeping Bag
Ultralight design and construction gives the regular size a weight of 20 ounces
900 fill Nikwax Hydrophobic Down™ stays dry and retains loft up to 60 times longer than untreated down
Down also absorbs 90% less water and dries three times faster without using dangerous PFCs
Lightweight materials and precise design allow for a smaller packed size than ever before for incredible packability
Box baffled construction uses mesh walls to maximize loft and minimize cold spots
SynergyLink™ connectors integrate the bag with a mattress for optimal efficiency and comfort, and are also removable for versatility
ThermaCapture™ lining to trap radiant body heat and retain warmth without adding bulk or weight
Zoned insulation maximizes warmth and saves weight by intentionally placing fill where you need it most
Also features a heat-trapping draft collar, zipper draft tube, snag-free zipper, and cinchable hood
Offers an extreme temperature rating of 20°F / -6°C
A compression sack and storage sack are included
Fabric Details
Shell: 10D Nylon RipStop with DWR
Lining: 10D Nylon RipStop ThermaCapture™
Fill: 900 Fill Goose Nikwax Hydrophobic Down™
Product Specifications
Compressed Bag Size:
3 Liters
Features:
Draft Collar, Ultralight
Shell Fabric:
10D Nylon RipStop w/ DWR
Bag Weight (Short):
1 lb 3 oz
Bag Weight (Regular):
20 oz.
Bag Weight (Long):
22 oz
Extreme Temperature Rating:
-9 Degrees Fahrenheit
Sleeping Bag Lining:
10D Ripstop Nylon
Shoulder Circumference (Short):
55 in.
Max User Height (Short):
5 ft 6 in.
Max User Height (Long):
6 ft 6 in.
Hip Circumference (Short):
49.5 in.
Foot Circumference (Short):
40 in.
Foot Circumference (Regular):
43 in.
Foot Circumference (Long):
46 in.
Shoulder Circumference (Regular):
57 in.
Hip Circumference (Regular):
49.5 in.
Shoulder Circumference (Long):
58 in.
Hip Circumference (Long):
51 in.
Ultralight:
Yes
Disclaimer:
We only ship this brand to US Addresses.
Gender:
Mens
Best Use:
Ultralight Backpacking, Backpacking
Insulation:
Down
Temperature Rating:
11 - 20 Degrees Fahrenheit
Exact Temperature Rating:
20 Degrees Fahrenheit
Sleeping Bag Shape:
Mummy
Max User Height (Regular):
6 ft
Fill Details:
900 Fill Power Goose Down
Product Reviews
Rated 3 out of
5 by
Kristofer from
Extremely light- poor qualityI received the Hyperion 20 a few weeks ago and headed out to the backcountry short after. After the first night I noticed a tear on the outside of the bag. The temperature dropped to 20, however, though combining with a NeoAir XTherm on top of a RidgeRest I couldn’t get a good night sleep.
Thermarest did great in creating an extremely light sleeping bad. Sadly it does not hold up to the standards I’ve set based on years of experience with high performance gear from them.
Hope I can continue to purchase with confidence also in the future.
Date published: 2023-03-27
Rated 5 out of
5 by
Great Value for Specs from
Great ValueI bought this bag for some spring desert camping, and this bag is perfect for me. It is slim at the bottom, and there isn’t an additional zipper, but it works well for my sleeping habits. I’m really impressed with the way this bag compresses and would recommend if you’re looking for a 20 degree bag.
Date published: 2023-03-21
Rated 5 out of
5 by
Jacob O. from
Ultralight furnace.This bag is fantastic. It’s incredibly light, and warm. Its only downside is that the fit is snug but that’s to be expected in a bag that’s as warm and as light as this one. I used it on several backpacking hunts this season and it’s packed size is minuscule so I’ve got more room to pack out game
Date published: 2022-12-17
Rated 4 out of
5 by
Yesh from
Almost perfectIncredibly light, surprisingly warm, packs down remarkably small. Biggest two issues are zipper related. The small zipper is a pain to use, and their is insufficient protection to ensure you don't tear the VERY thin materials with the zipper. I use more care than I should every time I zip and unzip this thing. Overall, I'm happy with it. If weight and pack size are your top priorities, and you still want a bag, not quilt, this is your bag.
Date published: 2022-12-16
Rated 4 out of
5 by
Ceasar G. from
Performs wellGreat bag, packs down well, is very efficient without being too snug even for someone with wide shoulders. One thing I would change is the length of the zipper I would like a full length zip instead of the 3/4.
Date published: 2022-10-05
Rated 5 out of
5 by
Jeffrey M. from
Alaskan Adventure BagJust got back from using this sleeping bag on an Alaskan fly-in hunt for sheep and black bear near Delta Junction. After 10 days of usage, I would rate the bag an overall of 5 stars.
Things most people don’t consider… this bag is rated for 32F comfort (ideal use temps), 20F limit (lowest you want to use it) and -9F risk (you might get severely injured). The hunt was low 30s to high 20s at night and the bag never had me more than slightly chilled, wearing only merino wool base layers. I would agree that this bags comfort limit is about 32F.
Another reviewer gave this bag a very low rating as it wasn’t warm enough, then went on to say they wore several layers of clothes in the bag. This is not ideal. In a sleeping bag, especially compact ones like this, it’s a best practice to only wear your base layers and nothing more. When you start layering up, you won’t allow the down to insulate your body and trap heat, making you colder. I actually tested this, one night wearing three layers and found it very cold. Next nigh, only base layers, and was much warmer.
Date published: 2022-09-19
Rated 5 out of
5 by
Dyan M. from
Great lightweight bag!!The material feels amazing and it is a perfect fit for my 5'1" frame.
Date published: 2022-08-14
Rated 1 out of
5 by
Hampus from
Very coldCalling it - 6 is a joke. Used it down to temperatures just above 0 and even with baselayer, slacks, two sweaters, socks, beanie, gloves and a silk liner i kept waking up being to cold. Used it in a msr hubba hubba with a thermarest neoair. I would rate it a +5 bag. Only good for summer. So much money wasted here since i need a 3 season bag and now have to buy another one since thermarest lie about there temperatur ratings.
How small can it compress to in liters and/or inches?
Asked by: Kate
Great question! The compressed volume is the size of a Nalgene bottle, approximately 3 liters.
Answered by: Foxxy Cleopatra
Date published: 2021-05-09
Do you have choice of left or right sided zippers? (My husband and I like to zip our bags together)
Asked by: Babs
Hi Babs, thanks for the question! Sadly this bag is only made in a left-zip option at this time and cannot be zipped together. Sorry about that but I hope this helps!
