Four-season canvas sleeping bag with plenty of room for comfort. The Big Cottonwood sleeping bag is designed for those unwilling to sacrifice comfort. You’ll forget all about your bed at home in this oversized, rectangular sleeping bag with plenty of room to stretch out. Featuring a rugged, canvas exterior with a soft-touch polyester liner, the Big Cottonwood’s high loft insulation will keep you warm in below freezing temperatures. A drawstring shoulder baffle seals in warmth and eliminates a cold draft. This ultra-comfortable sleeping bag is perfect for base camping, vans, RVs, trailers, and cabins.