A great choice for three season camping where a lot of warmth and space is needed, the 20 degree high peak alpinizmo Colorado 20 delivers a comfortable night's sleep with plenty of elbow room. the Colorado's diamond carding construction keeps the non-allergenic hollow fiber insulation in place and prevents cold spots. honey comb rip stop polyester shell and silk like liner are both durable and comfortable to sleep in while the 2-way main zipper allows for venting. the Colorado 20 can be fully unzipped and used as a blanket or can be combined with another Colorado 20 to form a double-wide sleeping bag. comes with stuff sack for storage and transport.