Marmot Trestles 30 Degree Sleeping Bag Don’t cancel your next overnight adventure just because the forecast is calling for a little rain—bring the all-purpose Trestles 30 Degree Sleeping Bag, built to perform in cool and damp conditions as you’re backpacking, trekking, mountaineering, and more. SpiraFil™ high-loft insulation will keep you warm even when things get wet. After a long day of exploring, zip up the full-length two-way zipper and give your feet a rest in the roomy 3D footbox. Its wave-construction top and blanket-construction bottom provide an unbeatable combo of maximum loft, warmth, and comfort. If the interior gets too toasty, use the fold-down secondary zipper to get some air. Tuck small items into the stash pocket for easy access.