Features of the Mountain Hardwear Rook 0F/-18C Sleeping Bag 650-Fill down is warm and compressible Lightweight but durable two-way 5 zipper with anti-snag for easy entry and exit Standard mummy cut is efficient, warm and comfortable Down-Filled face gasket comfortably blocks drafts at the hood opening Two-way zipper allows for easy ventilation Left hand and right hand zippers available for ziptogether functionality Durable water repellent finish Designed specifically for women with additional Insulation for increased comfort Stuff sack and mesh storage bag included Fabric Details Shell: 30D Nylon Plain Weave (100% Nylon) Lining: 30D Nylon Plain Weave (100% Nylon)