Made of tough but light 70 denier Nylon, this compression sack helps squeeze the air out of your textiles, sleeping bag or quilt. The volume number refers to an uncompressed bag. The compression straps have the capacity to reduce volume to approx. 1/3 of the total volume. The material offers protection from small amounts of moisture. The seams are not sealed, meaning if there's a lot of water or the exposure is long-term, water will seep in. - Tough but light 70 denier Nylon with DWR treatment - Top with cinch cord closure, on top of which the compression cap is placed - PFC-free, bluesign approved *The package contains one sack.* The product image displays the same bag both free and compressed.