LoftTek(TM) Hybrid Insulation is a mix of 80% LoftTek(TM) & 20% 800+FP down that provides bulletproof warmth and down like weight/packability even when soaking wet! 20D fabric & Hybrid LoftTek 650+ Fill Power Insulation reduce weight and increase packability so that you can pack it effortlessly AND stay toasty warm at night! Innovative Shoulder Baffles comfortably seal in the heat without needing to fight restrictive cords and drawstrings so you can sleep more free and peaceful! Center Zip Design & Boxed Zipper Baffles allow easy, warm access in and out of the bag without losing your zipper in the night which means smoother & faster entry and exit! Body Mapping Cut removes excess material for optimal weight to warmth ratios so that you only pack what you need to stay comfortable all night long! Outdoor Vitals Performance Promise: Here at Outdoor Vitals we believe in standing behind the craftsmanship and quality of our products. Anything that was our fault, we fix so you can feel confident that you are getting exactly what you paid for!