Alps Mountaineering Blue Spring Bag +20 Regular

The Blue Springs has an ultra lightweight insulation, with a MicroX+ 2 Layer Offset. Insulated zipper baffle, with 210T Nylon Ripstop outer, and 210T Polyester liner. #8 zippers, and the 35+ style had a half-zip option for venting or sitting up. Includes compression stuff sack. Comfort Rating: +20° or +35° (depending on model)|Carry Weight: 3 lbs. 5 oz. (+20°), 2 lbs. 11 oz. (+35°)|Size: 32” x 80”|Fill: MicroX+ Insulation|Fill Weight: 31 oz. (+20°), 21 oz. (+35°),|Shell: 210T Nylon Ripstop|Liner: 210T Polyester