Sea to Summit Ultra-Sil Dry Day Pack Atoll Blue One Size. As well as being ultra-lightweight and foldable it also resists water and packs into its own tiny stuff sack which comes complete with a carabiner key ring attachment. The seams are double stitched and sealed with high-density PU seam tape and the unique double hypalon roll-top is non-wicking and creates a good seal. The compression lacing system on the front rounds off this light and functional pack. Specifications for Sea to Summit Ultra-Sil Dry Day Pack: Manufacturer: Sea to Summit Size: One Size Gender: Unisex Weight: 3.9 oz Pack Application: Biking Pack Type: Large Day Pack Capacity: 1342 cu in / 22 L Fabric/Material: Siliconized Cordura Age Group: Adults Length: 18.9 in Width: 11.8 in Height: 8.7 in Pack Loading: Top Packed Size: 5x2.5x1.5 Water Resistance Level: Waterproof Features of Sea to Summit Ultra-Sil Dry Day Pack Ultra-Sil 30D siliconized CORDURA fabric for strength and durability Reinforced shoulder straps for increased carrying comfort Packs into an attached stuff sack that includes a handy carabiner Double stitched seams and fully tape sealed construction Elasticized compression lacing system Package Contents: Sea to Summit Ultra-Sil Dry Day Pack Sea to Summit 280-33: Ultra-Sil Dry Day Pack Atoll Blue One Size