View specs for sizes: 2 LITER, 4 LITER, 8 LITER, 13L, 20L, 35 L
Sea to Summit Ultra-Sil Dry Sack Specs
122 cubic inches
244 cubic inches
488 cubic inches
793 cubic inches
1220 cubic inches
2135 cubic inches
12 x 27 inches
Gear capacity (L)
Gear capacity (cu. in.)
Sea to Summit Ultra-Sil Dry Sack
Loading Ratings & Reviews...
Sea to Summit Ultra-Sil Dry Sackis rated3.5455out of5by11.
Rated4out of5byL is for love the outdoorsfromGreat color!I got this to give to my son, but kept it for myself.
Date published: 2014-01-31
Rated4out of5by1ReviewerfromReliable dry sackWithstood heavy, blowing rain in Patagonia. Stored my sleeping pad in it (8L size) and strapped it on the outside of my pack. It didn't tear despite getting hung on branches, scraping rocks, etc. The only time that water got in was when I left it sitting in standing water for over an hour...even then, only some water got in.
Date published: 2013-12-21
Rated5out of5bycornflowerfromgreat pack linersI have two of each size (plus a 1L) of these siliconized dry bags. My husband and I have used them many times for multiple-night backpacking trips and canoeing in the Boundary Waters. We use them as pack liners inside our backpacks or portage packs - we think they're great - lightweight and easy-to-pack. We try to pack them so that anything hard is packed in the middle of the pack so it won't poke the fabric - we do have some abrasion spots/scuffing where something hard or pointy has rubbed against the sides, but so far, all of the bags are air-tight and sound. I can get most of the air out of the bags by loosely folding the top over, smooshing the air out with my weight, and then rolling up the closure - the trickiest part is making sure the contents don't get carried up into the roll. The 35L bags will hold two regular-length REI Trekker sleeping pads or our synthetic-fill sleeping bags + liners (in lightweight compression bags). We use either the 20L or 13L bags for our clothes/personal bags (depending on the season/length of trip) and the 8L bags for our fleece/insulated jackets. The 4L holds my binoculars or a light-weight first aid kit and we use the 1L for my husband's compact camera/batteries/SD cards (splash-proofing). We did get a small hole in his camera bag, but that's because it got caught in his waist pack zipper. We patched it with some lightweight "duct" tape (on the inside) and it's been fine. I wouldn't expect these bags to be 100% waterproof, certainly not in a submersed situation, and definitely not for waterproofing electronics – but they work great with canvas portage packs in a puddly canoe and they keep fabric-items dry if the gear bag takes a quick dunk into the lake or it rains cats-and-dogs while backpacking. Another plus: they're easy to clean - I usually give them a good swish-rinse after every trip to get rid of any smokey-funky camp smell - good as new! We never put our tent into a drybag (with our luck, it's wet half the time anyway) and we use heavier dry bags when kayak camping. If you're looking for lightweight pack liners, these are great and we haven't had any trouble with durability.
Date published: 2013-12-05
Rated5out of5byPauoa BoyfromYuppers!!!Although my wife says my strong hands seem to rip or break everything, this definitely passed the test. Not sure if it's on purpose, but I like the way the closure turns into a loop for hanging.
Date published: 2013-11-25
Rated4out of5byHansenfromGreat waterproof food sackBought a couple of these sacks to use as food hangers for overnight trips. They worked great at keeping the contents dry while hung in an open clearing in the rain all night, for multiple nights. The closure mechanism even forms its own loop for hanging or clipping onto a rope. Added almost no weight to my pack.
The only real downside is that it's hard to get air out of them for packing away. Being watertight also means not breathable fabric. You have to squeeze from the bottom up to the closure, so there's always some wasted space.
Date published: 2013-09-18
Rated2out of5byKBHfromNot durableI used this bag on two short backpacking trips to carry my tent, and one river tubing trip to carry small items like a camera and extra clothes. It was waterproof and worked great up until the point where tears rubbed into the bag at the closure where it folds over. I'm not sure how they can market this as durable for backpacking when I really wasn't that hard on it and it ripped so easily.
Date published: 2013-07-15
Rated4out of5byPhillyBCfromSo far, so goodWe bought a few of these bags to use as bear bags. We got tired of waking up to soaked bags of food if it had rained overnight. I figured that their airtight nature would also add that much more protection to prevent our packs from picking up any food smells during the day. They've only been used on one trip so far but they did nicely, easily clipping into carabiners for hoisting.
Date published: 2013-06-13
Rated2out of5byaph0genfromGood for about a year, delicate use onlyI have several of these bags in different sizes. I use them for medical kits, clothes and essential items that must be kept dry while hiking, backpacking and camping. I have exposed the bags to rain repeatedly, submerged them in a backpack for short periods during river crossings. The packaging warns that they are not meant to be submerged.
The good: incredibly light product, easy to use. Waterproof qualities were good against rain and submersion.
Waterproofing qualities went away after about a year. Items in dry bags in my backpack got wet in rain. The tape at the bottom of the bag delaminated and pulled away from the fabric.
Bottom line: If you can afford to replace your gear often, these are great. I prefer somthing that lasts longer. I would not buy them again.
Date published: 2013-01-10
Ask a question and have it answered by REI product experts and fellow outdoor enthusiasts. Need immediate assistance? Use Live Help.