The Sea To Summit Reactor Extreme Liner With Drawcord is a must-have for outdoor adventurers braving cold climates. Crafted from Thermolite® fabric, it provides exceptional warmth without adding bulk to your gear. The drawcord closure system allows for personalized fit and enhanced insulation, while its lightweight and compact design make it perfect for backpacking. Compatible with most standard sleeping bags, it offers versatility for various conditions. With durable construction and easy maintenance, this liner ensures a comfortable night's sleep no matter where your adventures take you.