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Western Mountaineering sleeping bags as light as 1 lb.!

One of the most effective ways to save weight is by using a high-performance ultralight sleeping bag. Western Mountaineering's mummy-shaped HighLite sleeping bag is an incredible 16 ounces and the SummerLite with full-length zipper is just 1 pound 3 ounces. The semi-rectangular MityLite is only 1 pound 10 ounces! The TerraLite is perfect for side sleepers with lots of room in the middle. It’s only 1 pound 13 ounces and takes you down to 25 degrees. The MegaLite is a super-roomy mummy at just 1 pound 8 ounces. And the UltraLite will take you down to 25 degrees at only 1 pound 10 ounces.

The EXTREMELITE™ HighLite, SummerLite, MityLite, TerraLite, UltraLite, or MegaLite sleeping bag will help you trim not only weight but bulk from your pack. All six sleeping bags are filled with 850+ fill power down, the lightest and most compressible available. Nothing is more important to the quality and function of a sleeping bag than its insulation. That's why these bags have the very best. The fear of a wet bag keeps some people from buying a down bag. This is a mistake. Any wet bag is miserable to sleep in. Keeping your gear dry is not so hard! This is a simple skill you probably learned in elementary school while waiting for your school bus. Tents, bivies, and proper camp placement can all help you keep your bag dry. Shell fabrics are treated with a surface Durable Water Repellent (DWR) finish. This is more than sufficient to shrug off dew and condensation. DWRs can also be easily reapplied as time wears it thin. The shells are made from all new lightweight fabrics that weigh as little as .85 ounces per square yard. By the very nature of these fabrics, total and unrestricted lofting of the down fill is possible.

A stuff sack and storage sack are included. Western Mountaineering has been hand-crafting sleeping bags for over 40 years. All sleeping bags are guaranteed against manufacturer's defects for an unlimited time.

Our agreement with Western Mountaineering doesn’t let us ship to any country outside of the USA where they have a dealer. To see if there is a Western Mountaineering dealer in your country go to their site, then click on “FIND A DEALER” then “International Dealers.”

  Western Mountaineering Ultralite  

Western Mountaineering UltraLite Sleeping Bag


• Full-length #5 YKK Zipper
• Full Down Collar
• 5 1/4" Spacing/Continuous Baffles
• 5" Loft, 20° F
• 16 oz. Down Fill
• 1 lb. 13 oz. Total Weight
• Made in the USA

If you need a little more temperature range, the UltraLite mummy-style bag is only 1 lb. 13 oz., yet it will keep you comfortable at 20 degrees. The trim shape, continuous baffles, overstuffed draft flaps, differential cut, and full down collar give you great thermal efficiency. Left or right zip. Mateable with one of each.


See a helpful video about the lightest Western Mountaineering sleeping bags:



UltraLite: 1 lb. 13 oz., 6'0", 20 degree rating
Shouler 59", hip 51", foot 38"
$500 No. 3215 Blue, stuffs to 7"x13"


UltraLite Long: 1 lb. 15 oz., 6'6", 20 degree rating
Shoulder 60", hip 52", foot 38"
$515 No. 3216 Blue, stuffs to 7"x13"