The Ultralight Dry Bag is for both compression and water protection. It will fit easily inside your pack while keeping your gear dry & helping you save a bit of space. Take the Dry Bag to save space in your pack and give you peace of mind that your gear is protected! -Weight: 1.5 oz-30D Ripstop Sil/PU Nylon-Waterproof Rating: 2000mm HH-Fully Seam Taped-15mm Duraflex Buckle Rolltop-Dimensions: 21"x7"-Volume: approximately 13L-Warranty: Outdoor Vitals Performance Promise