Patagonia Black Hole 25L Light and strong polyester ripstop with highly weatherproof TPU laminate and a DWR (durable water repellent) finish Easy-access main compartment with padded sleeve holds most 15" laptops; zippered top pocket for small items Heavy-duty molded back panel for comfort and durability Stretch-woven pockets hold a wide range of water-bottle shapes and sizes 13-oz 450-denier 100% polyester ripstop (50% solution-dyed) with a TPU-film laminate and a DWR (durable water repellent) finish. Fabric is bluesign approved 680 g (1 lb 8 oz)