Sea to Summit Ultra-Sil 13L Compression Sack HighRise Grey Medium. Made from a water-resistant bluesign approved Ultra-Sil 30D nylon fabric with Non-PFC DWR this compression sack is far tougher than its weight would suggest. Ideal for use inside your pack or travel bag when you need to compress clothing or bulky soft items to allow space for other essentials or fun holiday items. Specifications for Sea to Summit Ultra-Sil 13L Compression Sack: Manufacturer: Sea to Summit Size: Medium Fabric/Material: 30D Nylon Weight: 2.9 oz Capacity: 13 liters Quantity: 1 Features of Sea to Summit Ultra-Sil 13L Compression Sack Compress soft contents down by as much as two thirds Side-release buckle compression straps for fast and easy access Water-resistant bluesign APPROVED Ultra-Sil 30D Nylon fabric with a non-PFC DWR finish Three ultralight compression straps with two ladderlock and one side-release buckles allows easy access and reduces weight Attached flip-top lid prevents straps tangling Package Contents: Sea to Summit Ultra-Sil 13L Compression Sack Sea to Summit A4533-11: Ultra-Sil 13L Compression Sack HighRise Grey Medium