Patagonia Refugio Pack 28L Strong and light recycled polyester with water-repellent finish Generous main compartment; secondary compartment with internal organization has plenty of options for electronics and supplies, along with a secure lanyard for keys; padded laptop pocket is raised off the ground to protect most 15" laptops Basic compression straps help secure load; exterior lash points; small pocket for sunglasses and electronics; stretch-woven pockets accommodate a full range of water bottle shapes and sizes Air Flow mesh shoulder straps and back panel; adjustable sternum strap Body: 7.5-oz 450-denier recycled polyester plain weave. Base: 7.85-oz 450-denier recycled polyester ripstop. Lining: 200-denier polyester. Stretch-pockets: 66% nylon/34% spandex. All treated with a DWR (durable water repellent) finish