This 40L waterproof dry bag is designed for kayaking, swimming, and other water sports. It features a high-frequency seam bonding technology to keep your essentials dry and has a spacious interior with an inner pocket for easy-access to essentials like your phone and keys. The bag is made of durable 500D PVC mesh material and has a marine-grade thermal welded seal, reinforced vinyl, and stitching at stress points for added durability. It also has a dry-wet separation function and is available in various colors and specifications.