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Ultra-Sil Pack Liner

Keep your pack organized and dry without a bulky rain cover

$34.95 – $44.95

50 liter50 liter
70 liter70 liter
90 liter90 liter
Sky BlueSky Blue
LimeLime
OrangeOrange

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 at which 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. The same bag will also have a Comfort limit, in the realm of 32°F, so a woman would be comfortable down to an air temperature of 32ºF. Men and women should always sleep in a layer of long underwear and use a sleeping mat with an R-Value appropriate for expected ground temperatures – without this, the sleeping bag itself is unlikely to keep the sleeper warm enough.


Here’s a basic categorization of appropriate use, based on rated temperatures:
Summer:   >+35ºF / +3°C
3-Season:   +10 to +35ºF / -15° to 0°C
Winter:   <10ºF / -15°C


A huge variety of factors can impact sleeping bag warmth - the above temperatures are merely guidelines, not guarantees. It’s important to think of a sleeping bag as one element in a sleep system which also includes an appropriately insulating sleeping pad and a liner. For instance - if you plan on sleeping in nighttime air temperatures of 27ºF / -3°C, choose a bag with a gender-appropriate rating of 23°F / -5°C nights, plus a sleeping mat with an R-Value of 2.5 to 3, and consider a Reactor thermal liner. If you have any questions about which temperature sleeping bag / R-Value sleeping mat you should select, or how to improve your warmth in a sleep system, reach out to us via our contact page any time.

$34.95

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Description

The Ultra-Sil™ Pack Liner won the prestigious Backpacker Editors' Choice award in 2006 and this award winner is an excellent solution for keeping contents of your pack dry. It's made of 30D Ultra-Sil™ CORDURA® brand fabric, making it super lightweight and is an oval shape to fit inside packs easier. The extra wide opening roll-top closure folds in three before being rolled and sealed with the low profile buckles. We've used bright colors to help with visibility when packing and unpacking, and a 50L, 70L and 90L size range to cover all options and bag sizes.

Highlights

Durability

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

Waterproofness

Should be kept in another bag or backpack

Best Use

Backpacking, Travel

Size Guide

50 liter: will fit in a 50-liter pack or smaller
70 liter: will fit in a 70-liter pack or smaller

90 liter: will fit in a 90-liter pack or smaller

Features

  • Ultra-Sil Pack Liner opens wide for easy packing when it's inside a pack
  • Unique top closure: extra fabric at the top folds in and hook and loops into place, then rolls down, creating a more compact closed loop at the top
  • Made of PU coated siliconized CORDURA®
  • Waterproof hypalon roll-top closure does not wick moisture
  • Waterproof seams - double stitched and tape sealed
  • Low profile buckles
  • Slippery finish for easy packing