CONVIENT STUFF SACKZipp Sacks are a more convenient stuff sack. They zip wide open for easy access to all your stuff. FEATURESSM: Liters: 7.5, Wt: 4.3 oz.MD: Liters: 12, Wt: 5.0 oz.LG: Liters: 18, Wt: 5.4 oz.XL: Liters: 25, Wt: 6.4 oz.