Made from siliconized CORDURA fabric, the ultra-lightweight and compact Sea to Summit Ultra-Sil Dry Daypack resists water and packs into its own tiny stuff sack complete with a Hypalon key ring attachment. The seams are double stitched and sealed with high density PU seam tape. The unique double Hypalon roll top is non-wicking and helps create a good seal. The compression lacing system provides secure storage. Features: Double stitched seams and fully tape sealed construction Ultra-Sil high strength and lightweight CORDURA brand fabric UltraSil fabric and Hypalon roll-top for water resistant performance Reflective compression lacing system Not intended for situations where pack will be submerged Specs:Size Variation: One Size/22 L Weight: 3.2 oz