SKU: SS21645 Eco Initiatives: PFC Free Insulation Type: Synthetic Weighs: 1362g Comfort Limit: -5°C Zip Length: 3/4 Length Zip Position: Right Zip Type: Mummy Synthetic sleeping bags are ideal for damp conditions where down may not perform as well. The Women's Shut Eye has a -5°C Comfort Limit which is impressive for a bag of this weight and pack size. Sierra Designs says… Womens Shut Eye 20 Synthetic Sleeping Bag