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Ultra-Sil Pack Cover

A pack cover you can trust

$26.95 – $44.95

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Sleeping Bag Temperature Ratings Explained

The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. The test produces a Lower rating (for male sleepers) and a Comfort rating (for female sleepers). Both are listed in the features table on the product page.

A unisex sleeping bag with 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. These ratings require 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.

A variety of factors impact sleeping bag warmth - the above temperatures are merely guidelines, not guarantees. It’s important to think of a sleeping bag, an appropriately insulating sleeping pad and a liner as a sleep system. For example - 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, plus a sleeping mat with an R-Value of 2.5 to 3, and consider a Reactor thermal liner.

$26.95

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Description

The Ultra-Sil™ Pack Cover ends the debate about whether you should carry one or not. It's a tiny and compelling solution and the medium size weighs less a mere 4 ounces. Packs into its own small stuff sack - why wouldn't you carry one?

Features

  • Made of 30D Ultra-Sil™ fabric constructed from CORDURA® yarns for durable, waterproof performance.
  • This pack cover does not use seam construction to ensure that it is completely waterproof
  • Packaged in its own mini siliconized Nylon stuff sack that remains attached to the cover so it can't get lost
  • Keeper strap (sizes S-L) pulls the pack cover tight across the pack harness
  • Sold in four sizes to fit daypacks up to large backpacks

Size Guide

  • X-Small: Fits a 15 to 30-liter pack
  • Small: Fits a 30 to 50-liter pack
  • Medium: Fits a 50 to 70-liter pack
  • Large: Fits a 70 to 95-liter pack

Pro Tip: If you stow any gear externally on your pack, we would recommend buying an Ultra-Sil Pack Cover a size larger than normal.