Built for the campsite and the backcountry, the 50°F Stormbreak features lightweight, technical materials and elevated trims along with high-performance HEATSEEKER™ PRO insulation for versatile warmth. Soft vertical quilting provides stretch in the lower-leg area while the full-length center zip is designed to be comfortable for side sleepers, so you can get a good night's sleep, no matter where your path leads.