You hear us talking a lot about Sierra Designs DriDown technology that is used in their jackets and sleeping bags. We want you to enjoy your time in the backcountry and be prepared for the harsh conditions that can surprise us. We put a lot of time in studying, testing and reviewing the products we carry. So, to understand why we are so excited about these products and highly recommend them, check out this video from Sierra Designs. They explain the magic inside the DriDown and compare it to traditional down.