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Sea to Summit Ultra-Sil Dry Sack


    Sea to Summit Ultra-Sil Dry Sack

    Still haven't found a backpacking stuff sack that is ultra-lightweight and waterproof? Look no further than the Sea to Summit Ultra-Sil dry sack. See details

    • $12.95 - $32.95

    Item # 777725

    Still haven't found a backpacking stuff sack that is ultra-lightweight and waterproof? Look no further than the Sea to Summit Ultra-Sil dry sack.

    Product size and color

    Still haven't found a backpacking stuff sack that is ultra-lightweight and waterproof? Look no further than the Sea to Summit Ultra-Sil dry sack.

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    Still haven't found a backpacking stuff sack that is ultra-lightweight and waterproof? Look no further than the Sea to Summit Ultra-Sil dry sack.

    • Siliconized on the outside, tough Cordura® nylon is weatherproof, lightweight and durable for hiking and backpacking in wet conditions
    • Polyurethane coating on the inside permits the fabric to be seam taped; waterproof seams are double-stitched and factory-taped for added weather protection
    • Hypalon® watertight roll-top closure keeps contents secure and protected; fold the Hypalon strip down first and make at least 3 rolls before closing the buckle
    • Roll-top fabric sacks are not intended for complete submersion; sensitive electronic devices should be double-bagged or packed in a waterproof hard case for maximum protection
    • Ultra-Sil sacks are designed for use inside a backpack and are not suitable for boating
    • Comes in assorted colors only; sorry, specific color requests cannot be accommodated


    Item 777725

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    View specs for sizes: 2 LITER, 4 LITER, 8 LITER, 13L, 20L, 35 L

    Sea to Summit Ultra-Sil Dry Sack Specs
    Best use
    2 liter4 liter8 liter13 liter20 liter35 liter
    122 cubic inches244 cubic inches488 cubic inches793 cubic inches1220 cubic inches2135 cubic inches
    Silconized nylonSilconized nylonSilconized nylonSilconized nylonSilconized nylonSilconized nylon
    8x9 inches9x15 inches6.5x18 inches8.5x21 inches10x24 inches12 x 27 inches
    0.8 ounces0.9 ounces1.1 ounces1.4 ounces1.8 ounces2.2 ounces
    Gear capacity (L)
    Gear capacity (cu. in.)
    Compression straps

    Sea to Summit Ultra-Sil Dry Sack

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    Sea to Summit Ultra-Sil Dry Sack is rated 3.5455 out of 5 by 11.
    Rated 2 out of 5 by from Good for about a year, delicate use only I 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. The bad: 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: 2014-04-13
    Rated 5 out of 5 by from great pack liners I 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: 2014-03-26
    Rated 5 out of 5 by from Great Lightweight bag This is a great product from sea to summit. Understand that these are NOT submersable bags and if you submerse them they will not keep your stuff dry. That being said, I store my papers (drivers liscense, pass port, cell phone, gps, etc) in this bag in the brain of my pack and it performs without a hitch. My cards did put a small tear in the side of the bag but a little seam grip fixed it right up. With lightweight gear, you are paying for leight weight not for durability. If you want something to sit in the bottom a raft, get the heavier vinyl or heavy rip stop, you're on a boat weight doesnt matter.
    Date published: 2014-03-26
    Rated 1 out of 5 by from Bad reviews are true Went kayaking and took this for the first and last time. It was great at first, held my granola bars, chaptick, tissue, and camera and it protected everything from the paddle splash and what not. My things were small not that sharp objects and next thing you know im taking out my camera and realizing its all wet and theres a tear on the bag, i had to duct tape it for the rest of the trip. I might as well have duct taped the entire bag. Im pretty disapointed so I bought the big river dry bag, pretty sure that'll be significantly better. Like everyone else said unless your storing this bag inside another bag and away from the world then i guess its usable but if not then dont waste your time.
    Date published: 2014-03-26
    Rated 4 out of 5 by from Great waterproof food sack Bought 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: 2014-03-26
    Rated 4 out of 5 by from Great color! I got this to give to my son, but kept it for myself.
    Date published: 2014-03-26
    Rated 3 out of 5 by from Got a hole in it the first use Bought two of these to put ziplocks with my dog's kibble into it for backpacking. I really liked how light-weight the bags are and they did a great job, until I realized on the second day of our backpacking trip that one of the bags got a hole in it. I'll give it another try to see if it was a fluke.
    Date published: 2014-03-21
    Rated 4 out of 5 by from So far, so good We 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: 2014-03-22

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