Western Mountaineering TerraLite 25°F Down Sleeping Bag
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Western Mountaineering TerraLite 25°F Down Sleeping Bag
The Western Mountaineering TerraLite is a 25°F (-4°C) down sleeping bag for side sleepers who want room to move without carrying a heavy, bulky bag. Its generous semi-rectangular shape offers considerably more space than a traditional mummy bag, making it a comfortable choice for restless sleepers and backpackers who prefer a less confining fit.
In the 6'0" size, the TerraLite weighs just 1 lb 13 oz, holds 18 oz of premium 850+ fill power goose down, and packs to approximately 7" x 13". It's a remarkably lightweight way to get a lot more sleeping room.
Made in the USA, the TerraLite combines Western Mountaineering's premium down insulation with a clever dual-zipper design that gives it versatility beyond an ordinary sleeping bag.
Western Mountaineering TerraLite Specs
| Specification | 5'6" | 6'0" | 6'6" | 7'0" |
|---|---|---|---|---|
| Total weight | 1 lb 11 oz | 1 lb 13 oz | 1 lb 15 oz | 2 lb 2 oz |
| Down fill weight | 16 oz | 18 oz | 19 oz | 21.5 oz |
| Inside girth, shoulder / hip / foot | 65" / 68" / 41" | 65" / 68" / 42" | 65" / 68" / 42" | 65" / 68" / 42" |
| Stuff size | 7" x 13" | 7" x 13" | 7" x 13" | 7" x 13" |
| Temperature rating | 25°F / -4°C | 25°F / -4°C | 25°F / -4°C | 25°F / -4°C |
Additional specifications
| Feature | Details |
|---|---|
| Shape | Semi-rectangular |
| Insulation | 850+ fill power goose down |
| Loft | 5" |
| Shell fabric | 12-denier ripstop nylon (ExtremeLite) |
| Lining | 15-denier nylon taffeta |
| Zippers | Dual full-length #5 YKK zippers |
| Construction | Continuous baffles |
| Made in | USA |
Sizes and zipper sides in stock vary. Pick yours in the options above, and call or message the store if you do not see the one you need.
Room to Sleep Your Way
The TerraLite is designed for people who find traditional mummy bags too restrictive. Its semi-rectangular shape provides generous space through the shoulders, hips, and footbox, giving side sleepers and restless movers room to change positions without feeling confined.
The difference is substantial. In the 6'0" size, the TerraLite measures 65" at the shoulders, 68" at the hips, and 42" at the foot. Compare that with a traditional mummy bag and you'll understand why the TerraLite feels so accommodating.
It is still a thoughtfully designed insulated sleeping bag, not simply a lightweight blanket. The 5 inches of loft and premium down provide insulation while the shape gives you room to move.
A Clever Dual-Zipper Design
The TerraLite has two full-length #5 YKK zippers, and they're there for more than convenience.
Open the zippers to ventilate the bag on warmer nights, or unzip it completely to lay it flat like a comforter. This makes the TerraLite especially versatile for warm-weather camping, camper-van trips, and nights when you'd rather have a little more freedom than a traditional sleeping bag allows.
The dual-zipper arrangement also allows the TerraLite to mate with compatible Western Mountaineering mummy bags, making it an interesting option for couples who want to combine their sleep systems.
Premium Down, Thoughtful Construction
The TerraLite uses 850+ fill power premium goose down. Higher fill power means the down occupies more space for a given weight, creating excellent insulation without adding unnecessary bulk.
Its continuous baffle construction allows you to shift down within the chambers to adjust insulation distribution. You can
