UltraLight SI Mat

Lightweight, simple & sturdy

$69.95 – $99.95

Size Guide
X-SmallX-Small
SmallSmall
RegularRegular
LargeLarge

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.

$69.95

Other ways to purchase

No Online Retailers Stocking Current Selection

Description

For the ultralight enthusiast, the Ultralight™ Self Inflating mat will add the promise of a comfortable sleep to your pack, and not a whole lot of weight or bulk. Delta Core-V™ technology is used to remove small sections of foam without sacrificing comfort. The silicone grip print embossed on the mat ensures you and your sleeping bag stay on the mat. For the ultralight adventurer, pack up is super easy with the patent pending multi function valve that allows you to roll up the mat without air trying to sneak back in as you go. Ideal for gram counters who like to sleep comfortably.

Highlights

Weight

Regular: 19 oz ≈ Lighter than a carton of eggs

Packed Size Comparison

Similar to a roll of paper towels

Performance

2 Seasons: Perfect for late spring to early fall, except at altitude

Durability

Woven 30D polyester face fabric chosen for its light weight and strength

Features

  • R-Value of 2.6
  • 1 inch thick.
  • Utilizes Delta Core-V technology, which keeps body contact areas warmer while still offering great support and pack-ability.
  • Patent-pending multi-function valve twists over to allow the mat to be rolled tightly without fighting re-inflation as you go.
  • Silicone print prevents your sleeping bag from slipping on the mat, or the mat slipping on the tent floor.