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Organize your gear without adding weight.

Organize your gear with ultralight ease thanks to the Sea To Summit Ultra-Sil Stuff Sacks. These highly water resistant sacks feature double-stitched seams and bar-tacked stress points for durability and a smooth, siliconized finish for easy packing and stuffing.

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Sea To Summit Ultra-Sil Stuff Sack

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Here's what others have to say...

5 5

Super light

  • Familiarity: I've used it once or twice and have initial impressions

These are just what I was wanting. Super light, and yet hold air when folded shut, so the 20 liter should be great at keeping water off my sleeping bag in the backpack, and the 4 liter is my new food bag. Just a heads up for those not familiar with the material: it is super light weight and must be protected against pokey things, or it will get holes and leak. Treated properly, I believe I'll get many years of good use from these.

4 5

You can never have too many of these!

They are light, strong, keeps your stuff dry and organized.

I have so many to hold clothes, wet jackets, climbing gear, slack lines... you get the idea.

For a size reference: the small holds 80 feet of 1" webbing, two 10 foot sections of 1" webbing, 4 carabiners and 2 rap rings. And there's still a little room to spare.

A little more expensive than others but worth it in my opinion. I only wish we could choose the color.

Sea To Summit XS Ultra-Sil Stuffs Rock!

Sea To Summit XS Ultra-Sil Stuffs Rock!

A couple of Sea to Summit XS Ultra-Sil Stuff Sacks (the red and green ones) on display during week-long trip through Colorado's Maroon Bells - Snowmass Wilderness.

5 5

Sea To Summit XS Ultra-Sil Stuff Rocks!

  • Gender: Male
  • Familiarity: I've put it through the wringer

I've been using the XS Ultra-Sil Stuff Sacks for years. I use one as a stuff sack for my "regular" Therm-A-Rest Prolite Pad (fits perfectly). I use another as a storage sack for my cook set (Jetboil Sol Ti, Jetboil spoon, extra Jetboil 100g fuel canister, plastic REI bowl). These stuff sacks are light (0.50 oz) and get the job done. What's not to like?!

4 5

Not what I thought....but it works

The only downfall to me about this product is when I looked at what was being advertised I thought I'd get around three stuff sacks, however when they came in the mail turns out you really only get ONE! Other than that the stuff sack that I did get was awesome when I used it for my clothes. I was really surprised at how much it could hold.

4 5

Does its job

Super light and strong. Sizes are probably a bit smaller than what you think. Just wish I could order specific colors.

4 5

Sea To Summit Ultra-Sil Stuff Sack

This is a great little stuff sack. It is nothing more or nothing less. It does what it is suppose to do. If you are looking for ultra light weight you may want to go with something else.

3 5

Decent product

Bought one of these for my first aid kit and toothbrush etc. on a hike through the White Mountains. The bag works great...that is it holds your stuff. But I found myself wondering why I didn't just stick my stuff in a Ziploc. Will work great if you want to color code stuff in your pack with all kinds of little bags, but essentially all it is is a glorified plastic bag.

Responded on

G'Day noj -

We're probably a little biased (after all, we are the manufacturer), but here are some points which we like about Sea to Summit UltraSil Stuff Sacks which we haven't noticed on Ziploc bags:

- made of tough, siliconized Cordura fabric (will not snag like PE film)
- available in sizes from 2.5 all the way to 30 Liters
- equipped with a separately sewn-on drawcord channel; the opening of which is 180° away from the side seam. The drawcord doesn’t stress the seam
- equipped with a hypalon tab with a die-cut karabiner hole to help you hold onto and hang up your stuff sack
- available in 6 colors to help you sort your gear

Check the Sea to Summit TV video below...

Hope this helps

Barry Robertson
Sea to Summit Customer Relations Manager

5 5

nice 15L sack for 3 days clothes and nice pillow

I had that for 3 days Brazilian winter camping at Itatiaia National park in Rio de Janeiro. The weather normally go under -5C. The sack fits all I needed to survive for 2 nights. I definatelly recommend this product for campers.

Why do you have the wrong picture of this...

Why do you have the wrong picture of this product?

Responded on

Hey there,

good catch, it's an old picture but inventory is updated so you can expect the bag's to come as shown on the Sea to Summit site.

3 5

No lid

True to stated weight and size.... check.
Handle on bottom .... check.
Really water resistant .... Check.
Good micro cinch lock to keep it light .... check.
Lid? Where's the lid? I need a lid when I over-stuff this sack! Good Sack anyway!

BackCountry gets a thumbs down on this for NOT changing the picture; This is not a roll-top sack.

5 5

don't go by the picture

Just so you are aware, the picture above is incorrect. The Ultra Sil Stuff Sack does not have a roll top closure but rather a draw cord with a standard small cordlock. In actuality, it looks and feels very similar to the stuff sack that the Therm-a-Rest ProLite 4 sleeping pad comes with.

Regardless, it's a pretty handy stuff sack. It's very lightweight and it's waterproof - two important characteristics in the backcountry. There is a handle on the bottom (closed) end which is handy for carrying it and it seems pretty durable. I keep my sleeping back in mine and it works perfectly.

Responded on

Too bad most of the reviews downgrade the bag because Backcountry apparently screwed up the description. For anyone looking for a rolltop bag, Sea to Summit makes several different types, my favorite being the waterproof (but not submersible), eVent Compression Dry Sack.

3 5


Stuff sack is not exactly what I was thinking I would get. As the last review stated the xs, which is what I oredered, and the L (I suppose based in their review) don't have the roll top closure. I wasn't exppecting a cinch cord. I guess I can understand that on the xs, but on the L...???? Just don't understand the logistics of that one. At any rate, I was going to need a stuff sack about this size and the cinch cord instead of the roll top band makes it a lil more light weight so I'm not going to be upset. However, BC SHOULD look into changing this listing to clarify this issue, cuz I REALLY did need a stuff sak with roll top closure about this size for electronics and such. It gets 3 stars, not because it isn't a decent product; it is. 3 stars because it is only adequate, not extraordinary!

4 5

stuff this in yo' sack

nothing spectacular, but they do their job well. they can fold to an incredibly small size when not in use. i'm only giving them four stars because the stuff sacks (XS and L) had a cinch chord top rather than the roll top i had wanted.