Engineered for lightweight, breathable warmth, the GoLite Adrenaline Zero-Degree Sleeping Bag is perfect for backcountry snowtramping.
When keeping warm isn’t just a matter of comfort, it’s a matter of safety as well, having a bag that will keep you toasty and conserve your nighttime calories is essential. For Kyle, this bag has literally been a lifesaver, in whiteouts and windstorms alike.
How does this bag keep you so warm? Every detail from the inside out contributes to a maximum-warmth, efficient design. The fit itself is tailored to a mummy-style silhouette, producing an optimally thin layer of air for your body to heat and maintain between itself and the bag.
The bag keeps heat in with the help of mother nature’s very own high-efficiency heat retention device perfected over years of evolution– 100% natural goosedown. Go Lite pumped the bag with this literally feather-weight stuff at 800 fill, meaning it’s full to the brim of lightweight insulating material.
Because down doesn’t do well when you get it wet, Go Lite figured out how to both discourage water retention and maximize breathability with their own fabric that allows condensation and moisture to leave the bag (sweaty sleepers, take heed), but won’t let that morning dew on the inside of your tent compromise the bag’s performance. This PerTex fabric, also used in super lightweight rain wear, also retains the down feathers as well (some fabrics allow the tiny down feathers to easily leak). As a further measure to protect you from tent-borne condensation, the head and feet of the bag are coated with an extra layer of waterproofing.
Finally, potential escape routes for air are minimized with a shorter zipper. Much like a half zip pullover you might wear as a baselayer, the Adrenaline bag zips only half way down the center of your torso, allowing you to adjust the bag easily from a reclined position, all while preventing the zipper from accidentally unzipping too far or leaking extra air while your crazy-exhausted body snoozes blissfully unawares. This also cuts zipper weight in half.
If you’re touring somewhere with wetter snow or a high likelyhood of rain, just be sure to keep the bag dry by packing it in something water-resistant. We recommend a lightweight dry bag, such as this one by Sea to Summit (another fave).
True to its namesake, this Go Lite bag weighs a measly 2 lbs, 10 oz, even with all its toasty features.
- Best for: Staying plenty warm, but carrying the least amount of weight.
- Specs: Weight: 2 lbs, 10 oz (men’s regular), Temp. rating: comfortable to zero degrees F, Packs to: size of two nalgene bottles (men’s regular); Male-specific and female-specific models cut to form-fit anatomy in various lengths.
- Awards for the Adrenaline Series Bags: Gear of the Year Award from Outside, Editor’s Choice from Backpacker Magazine (2008)
- Reviews & Articles: Seattle Times article on 20-degree version, Backpack Gear Test Test Report.