Outdoor Research Ultralight Dry Sacks

1 review
5-star:   1
4-star:   0
3-star:   0
2-star:   0
1-star:   0



We each use the 3L size to put the items we don't…

Rating: rated 5 of 5 stars
Source: bought it used
Price Paid: $7.50 each


We each use the 3L size to put the items we don't want to get wet while we're backpacking (phone, wallet, access papers, matches, etc.). They are lightweight and durable, more so than the ziplock baggies we used in the past.


  • Virtually weightless
  • Waterproof
  • Ultralight material is surprisingly durable


  • None

I bought two of these 3L OR Ultralight dry bags a couple of years ago on ebay. My children were wanting something to carry their phone and other items they didn't want to get damaged if it rained. The baggies they used before almost always had holes in them by the time we returned from a backpacking trip so when some guy had them for sale on ebay, I bid on them.

They've performed as I always expect for OR products.  I have several other normal and ultralight OR non-dry stuff sacks and I have always enjoyed the reliability of their products. I float tested one of these when I first got them and water never penetrated the material.

The role top design has held up for several years and there is really not much wear showing. My girls usually have them out of their packs when at the campsite and they are laying around in all kind of conditions (rain, sun, sand, rocks, pine straw, etc.).

Highly recommended!

Manufacturer's Description

Visit Outdoor Research's Ultralight Dry Sacks page.

Retailers' Descriptions

Here's what other sites are saying:

Next time you get caught on the trail in a downpour, you'll be happy you have this Outdoor Research UltraLight dry sack to protect your clothes and valuables.


The Outdoor Research Ultralight Dry Sacks are lighter than most stuff sacks even while sporting the buckles, roll top close system, seam tape and slightly more durable fabric. How do they do it? For less than an ounce you can ensure your gear stays dry without making your pack heavy. Happy creek crossings! Available in sizes from 1 to 20 liters so you can store everything from your cell phone to down jacket Waterproof roll-top closure is a simple, yet effective way to ensure watertight performance! Fully taped seams ensure water can't seep into the seam Ultralight 40D material is light, supple and reasonably durable Durable buckle closure is full sized and durable TPU-Coated webbing D ring PVC-free

- OMCgear

Outdoor Research Ultralight Dry Sack FEATURES of the Outdoor Research Ultralight Dry Sack Waterproof Lightweight Fully Seam Taped Waterproof Roll-Top Closure with Lightweight TPUCoated Webbing Durable Buckle Closure D Ring SPECIFICATIONS of the Outdoor Research Ultralight Dry Sack 100% polyester, 40D, polyurethane coating SPECIFICATIONS for 1L Average Weight: 0.8 oz / 22 g Volume: 61 cubic inches / 1 liter Dimension: 5 1/4 X 5 1/2in. / 13 x 18 cm SPECIFICATIONS for 2.5L Average Weight: 0.9 oz / 26 g Volume: 153 cubic inches / 2.5 liter Dimension: 8 X 8in. / 20 x 20 cm SPECIFICATIONS for 3L Average Weight: 1.0 oz / 30 g Volume: 183 cubic inches / 3 liter Dimension: 9 1/4 x 9 1/4in. / 23 x 23 cm SPECIFICATIONS for 5L Average Weight: 1.2 oz / 34 g Volume: 305 cubic inches / 5 liter Dimension: 14 5/8 x 6in. / 29 x 15 cm SPECIFICATIONS for 10L Average Weight: 1.4 oz / 40 g Volume: 610 cubic inches / 10 liter Dimension: 17 1/8 x 7in. / 43 x 18 cm SPECIFICATIONS for 15L Average Weight: 1.6 oz / 46 g Volume: 915 cubic inches / 15 liter Dimension: 19 5/8 x 8in. / 50 x 20 cm SPECIFICATIONS for 20L Average Weight: 1.8 oz / 50 g Volume: 1220 cubic inches / 20 liter Dimension: 20 1/2 x 9in. / 52 x 23 cm SPECIFICATIONS for 35L Average Weight: 2.4 oz / 70 g Volume: 2136 cubic inches / 35 liter Dimension: 24 1/4 x 11in. / 62 x 28 cm SPECIFICATIONS for 55L Average Weight: 2.9 oz / 84 g Volume: 3356 cubic inches / 55 liter Dimension: 26 x 13in. / 66 x 33 cm This product can only be shipped within the United States. Please don't hate us.

- Moosejaw

Outdoor Research 55 Liter Ultralight Dry Sack is the biggest of the ultralight dry bags, perfect for protecting the contents of your backpacking backpack. Silnyl fabric, fully taped seams, and roll-top closure keep your gear dry. Not intended for prolonged submersion underwater. 55 liter size is great as a waterproof pack liner for larger backpacks. Infinite Guarantee - Outdoor Research products are guaranteed forever. The perfect pack liner for overnight and weekend-long backpacking trips where you need protection from your gear getting wet. Material: 40D silnyl waterproof fabric. Color: Twilight

- Tahoe Mountain Sports