Designed with water sports in mind, Shrink Bag Pro is tapered toward the edges so it can easily fit in the ends of kayaks. It’s roll-top closure is built with the addition of a seal-flap extension, which multiplies the recommended three folds, increasing waterproofness. The bottom corners offer integrated lash-points for securing to the boat deck or other exposed locations. The FlatValve efficiently purges excess air, allowing maximum compression of contents. Constructed of extra-durable, polyurethane-coated, 210-denier Oxford polyester with all seams factory sealed. The FlatValve turns this stuff sack into a sleeping mat inflation device when the EXPED Schnozzel inflation tube is attached. Features Waterproof due to a special roll-top closure; welded construction Flat profile with numerous anchor points and FlatValve Durable fabric for versatile use 100% waterproof (not submersible) and dustproof Specifications 5Volume: 5 LDimensions: 19.7 × 7.9 inWeight: 3.9 oz15Volume: 15 LDimensions: 25.6 × 13.8 inWeight: 6.0 oz25Volume: 25 LDimensions: 31.5 × 15.7 inWeight: 7.9 ozMaterials 210 D nylon fabric, TPU film laminated, welded construction, Oeko-Tex 100® certified, DWR C6