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Last updated January 1st, 2020
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The Sea To Summit Ultra-Sil Compression Sack is a compressible sack for organizing and shrinking the gear inside your pack. Haul your sleeping bag, extra clothing and more with an ultralight, compressible sack that takes up less space. Pack it up, roll the top and clip it shut, then utilize the 4 compression straps on the exterior to bring down the size. Available in five different sizes plus a few different colors.
FEATURES of the Sea to Summit Ultra-Sil Compression Sack
4 straps for even compression
Extra long straps so these sacks can really be filled to capacity
Bar tack reinforced stress points
Pull handle on the bottom
Slippery finish for easy packing
Product Specifications
Features:
Compression Straps
Best Use:
Backpacking, Mountaineering and Alpine, Camping
Dimensions (Extra Small):
6 x 14 in.
Dimensions (Small):
7 x 16 in.
Dimensions (Medium):
8 x 18 in.
Dimensions (Large):
9 x 20 in.
Dimensions (Extra Large):
10.5 x 23 in.
Weight (Extra Small):
2 oz
Weight (Small):
2.3 oz
Weight (Medium):
2.7 oz
Weight (Large):
3.3 oz
Weight (Extra Large):
3.8 oz
Disclaimer:
We only ship this brand to US Addresses.
Stuff / Compression Sack Closure:
Drawcord
Product Reviews
Rated 5 out of
5 by
Scott S. from
Love the xs size ,[This review was collected as part of a promotion.] Love the xs size , I can fit up to 4 of them in my personal underseat bag.
Date published: 2023-03-19
Rated 5 out of
5 by
Daisy H. from
• Clothes • Weight Fit[This review was collected as part of a promotion.] The Organization is easy, the Quality and the Clothes are durable, the Size is perfect, the Weight is featherlight, and the Fit is versatile and suitable for many uses.
Comes with a handle. Packable. Provides great protection. Handle for easy carry and transport. Easy to use. Fits inside larger bags. I hope for more colours and discounts available.
Date published: 2023-03-08
Rated 5 out of
5 by
Adam D. from
Excellent[This review was collected as part of a promotion.] Worked great ad is ultralight. Thinking about getting a second one!
Date published: 2023-03-06
Rated 5 out of
5 by
Steven C. from
Great Product![This review was collected as part of a promotion.] Perfect for compressing clothes to maximize pack space. Lightweight and water resistant to keep out light rain and sleet on its first outing. Very satisfied.
Date published: 2023-03-01
Rated 5 out of
5 by
Anna K. from
Handy little day pack[This review was collected as part of a promotion.] Super sturdy and a surprisingly comfortable fit. Often these small packable bags feel terrible once you put them on but not this one. I wouldn't mind if it had a chest strap or a tiny pocket somewhere but I understand leaving these things off to make it an ideal weight for adding to your backpacking gear. Very well made and a good buy!
Date published: 2023-02-16
Rated 4 out of
5 by
Thomas L. from
I got this item to[This review was collected as part of a promotion.] I got this item to stow a garment/blanket while biking or backpacking. It is the right size and based on how well the Big River dry bag is made, I trust it will serve me well.
Only 4 stars because the jury is still out. Thank You.
Date published: 2022-12-10
Rated 4 out of
5 by
Kelsey Z. from
Great weight for amount of protection[This review was collected as part of a promotion.] Great weight to protection ratio but im not sure I would trust the seams to be sumerged under water!
Date published: 2022-10-12
Rated 5 out of
5 by
Marc D. from
I have been using these[This review was collected as part of a promotion.] I have been using these for ten years and they are still going strong.
I see you have answered the sizes' capacities in liters, but could you give us the dimensions (in inches) of each size as well?
Asked by: msteppe91
Hey there,
Thanks for reaching out to us! As requested, here are the dimensions, in inches...
3XS- 4 in X 9 in
2XS- 5 in X 10 in
XS- 6 in x 14 in
S- 7 in x 16 in
M- 8 in x 18 in
L- 9 in x 20 in
XL- 10.5 in x 23 in
I hope this helped you out!
Answered by: Rocko Gigsby
Date published: 2018-08-20
hi, what size stuff sac for a marmot never summer regular size ? Will the stuff sac fit inside a osprey aura ag 50..Thanks you
Patti
Asked by: patti
Hiya Patti, thanks for your question! The Marmot Never Summer sleeping bag includes a stuff sack that measures 8.5 x 18 inches but it can be compressed to about 10.7 liters. You would need either a medium or large size Ultra-Sil Compression Sack. Yes, you should be able to fit the sleeping bag in the Aura AG 50 pack. Hope this helps!
Answered by: Alice in Wanderland
Date published: 2018-04-02
What are the maximum capacities, in liters, of each size?
Asked by: nace
Hey Nace,
Here are the capacities in liters for each size:
3XS- 1-2.5 L
2XS- 1.3- 3.3 L
XS- 2-6 L
S- 3.3-10 L
M- 4.5-14 L
L- 6.5-20 L
XL- 10-30 L
Answered by: Rocko Gigsby
Date published: 2019-01-07
I have a Western Mountaineering Versalite in 6'6" length and 3oz of overstuff. Will this bag fit into the small sea to summit event or sil compression sack?
Asked by: AJ_CO
Hey AJ_CO, thanks for the question! Unfortunately no, a regular length standard stuff bag will need every bit of room in this small option. I would say you need at least the large size option to make this work. Sorry about that, but I hope this helps!
Answered by: Marty Moose
Date published: 2020-05-12
What size of Sea to Summit sil nylon eVent sack do I need for a sleeping bag that rolls to 9" X 12"?
Asked by: Bwana
Hey there,
Thanks for the question. With those dimensions, the closest fit you could get would be the size Large, which is 9" x 20", however that might be too long for your bag. Unfortunately all smaller sizes of this are too narrow in the width to fit your bag. Once this is compressed down using the straps the height of the sac might not matter, but if you're looking for an extremely compact compression you may have to try another compression sac with different dimensions.
Answered by: Rocko Gigsby
Date published: 2016-07-03
What size compression sack would i need for the nemo riff 15 down bag?
Asked by: jjtexas
Hey there!
Great question!
The Nemo Riff 15 Sleeping Bag comes with its own compression sack, but if you're looking for a replacement sack for a bag you already have, we would definitely try the medium in this Ultra-Sil compression sack.
I hope this helps!
Answered by: Buttercup
Date published: 2018-10-30
What size sack for a Nemo Forte 20 long sleeping bag? Thanks
Asked by: John
Thanks for reaching out! We recommend the 14 liter (medium) compression sack to pair with the long version :)
Answered by: Foxxy Cleopatra
Date published: 2021-01-23
Hi Moosejaw, What size compression sack would my son be able to stuff his Mountain Hardwear Bozeman Flame, size Long, sleeping bag into? He is going backpacking for spring break and needs it to be smaller than the stuff sack included.
Asked by: Teri
Hi Teri, good question! The Bozeman Flame Long, should fit in this medium sized stuff sack just fine. If you really give it an effort to pack it down tightly, you may be able to squeeze it into the small. I hope this helps!