BackBack

Ultra-Sil Compression Dry Sack

Ultralight compression for when things should be dry

$29.95 – $49.95

XXS / 3.3 literXXS / 3.3 liter
XS / 6 literXS / 6 liter
S / 10 literS / 10 liter
M / 14 literM / 14 liter
L / 20 literL / 20 liter
GreyGrey

Sleeping Bag Temperature Ratings Explained

The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. Unisex sleeping bags list the Lower Limit which is the lowest temperature rating that an average male sleeper would be comfortable in.  Our women’s sleeping bags list the Comfort Limit, which is the lowest temperature rating an average female sleeper should be comfortable. The comfort and lower limit temperature ratings are listed in the features table on the product page. 

For example, a unisex sleeping bag that shows a lower limit of 23ºF means a man should be comfortable down to air temperatures of 23ºF while a woman would be comfortable down to the air temperature of 30ºF, the comfort limit. Men and women should always sleep in a layer of long underwear and use a sleeping mat.


Here’s a basic categorization of appropriate use, based on temperatures:
Summer:   >+35ºF
3-Season:   +10 to +35ºF
Winter:   <10ºF


There’s a huge variety of factors that can impact sleeping bag warmth, so these ratings are not guarantees. We always recommend choosing a bag that is a few degrees colder than you plan on going out in (choosing a 23ºF bag for 27ºF nights). If you have any questions about which temperature you should select, or how to improve your warmth in a sleep system, reach out to us on our contact page any time.

$29.95

Other ways to purchase

No Online Retailers Stocking Current Selection

Description

The Ultra-Sil™ Compression Dry Sack is a super lightweight dry sack designed to compress bulky clothing or other squishable gear that lives inside your pack. Made from Ultra-Sil™ 30D CORDURA® Nylon fabric with an eVent® fabric base, the air can be rolled out but can't get back in. It's an ideal option for use inside a backpack during longer lightweight hikes, adventure travels, cycle touring and any activity where you need to maximize pack space by compressing your bulky items to one-third of their volume. It employs waterproof seams, a hypalon roll-top, non-wicking closure and is super lightweight.

Read more about which dry bag is right for you HERE

Highlights

Durability

Keep it inside your pack and away from hard edges and corners.

Waterproofness

Greater than 2000mm hydrostatic head – more than sufficient water protection for use inside a pack

Best Use

Backpacking, Hiking & Bike Packing

What this bag could hold

XXS / 3.3 liters: socks, underwear & beanie
XS / 6 liters: Extra layers or a high-performance sleeping bag (such as the Spark 25°F) or a quilt (Ember 25°F)
S / 10 liters: a two-season or a high-end three-season down sleeping bag or a larger puffy jacket
M / 14 liters: a mid-range three season sleeping bag
L / 20 liters: a three-season synthetic sleeping bag plus a Reactor Liner

Features

  • Waterproof hypalon roll-top closure with lid and 4 straps for compression
  • Air permeable eVent fabric base allows air to be pushed out but water can't get in
  • Lightweight Ultra-Sil body
  • Waterproof seams - double stitched and tape sealed
  • Reinforced stitching on all stress points
  • Roughly half the weight of the original eVent Compression Dry Sack
  • As of 2018: Features the patent-pending 5/8in | 15mm Field Repair Buckle with stainless steel pins