The Sea to Summit Hydraulic Dry Pack is a rugged, abrasion-resistant backpack for paddle sports, canyoneering, overlanding, and other outdoor adventures. Manufactured from high-performance, abrasion-resistance TPU-laminated 600D nylon, with a 10,000mm waterhead (the higher the waterhead rating, the more waterproof the fabric), it’s ideal for rough conditions in river and outdoor environments. Features welded construction for permanently sealed seams, a secure TPU roll-top closure, and lash loops for attachment. The removable mesh and foam harness delivers comfort and airflow when portaging or carrying heavy loads, and has fully anodized aluminum buckles; adjusts at back, hips, and sternum (back length fits torsos 15 - 24 inches, hip belt fits waist/hips 24 - 38 inches). Patent-pending field repair buckles at hip belt, sternum strap, and bag closure can be replaced in seconds with a Phillips screwdriver. The Sea to Summit Hydraulic Dry Pack is available in four sizes: 35 liter, 65 liter, 90 liter and 120 liter, to carry large loads for paddle and outdoor trips. Sea to Summit products are guaranteed against defects in materials or workmanship for the lifetime of the product.