Super comfortable and warm, this Alps Mountaineering Clearwater mummy bag is suitable for 3-season backpacking-and you cant beat the price MicroX polyester insulation has a tremendous warmth-to-weight ratio, creating a warm bag with minimal weight and bulkiness. Double-layer construction increases loft and eliminates cold spots. Full-length draft tube keeps cold air from penetrating the durable 2-way zipper. Compression stuff sack included. Special buy.