Patagonia backpack 28l - Gem。This is a Patagonia Petrolia Pack 28L backpack, red. NWOT Body is made of strong, lightweight recycled polyester with a DWR (durable water repellent) finish Cavernous main compartment; multiple zippered stash pockets and large stretch front pocket Dedicated side-access laptop pocket holds most 15\" laptops and is raised off the ground to protect electronics; doubles as an insulated hydration reservoir pocket with tube port Air Flow-mesh shoulder straps and back panel; adjustable sternum strap Stretch-woven pockets accommodate a wide range of water-bottle shapes and sizes Top-mounted, reinforced haul handle Comes from a clean, smoke free home