Leaky hydration bladders and drippy tent walls won't be too much of an issue for the Millet Baikal 1500 Long 25 Degree Synthetic Sleeping Bag. Millet insulated this bag with its SuperMix Fiber--silicone-treated, hollow core synthetic fibers--to allow the bag to retain insulating properties should it happen to get wet when you're out in the backcountry. Then, Millet wrapped it all up in a 40D ripstop nylon to resist wear and tear, and keep all of that heat-trapping insulation in place. The Baikal can also be machine washed and stored in a compression bag, without the synthetic fibers losing loft or insulating properties. With its 25-degree temperature rating, the Baikal will easily handle shoulder season backpacking and climbing trips, and offers adequate warmth when you're camping above treeline during a summer thru-hike or overnight peak-bagging mission.