For hiking, travel or school, the Mountainsmith Day TLS (Technical Lumbar System) Lumbar Pack is designed to stash all of the bare essentials (and then some) that you can't imagine leaving home without. It's made from Reforge? recycled PET body fabric (100% Recycled) and high tenacity nylon in key wear areas to up the ante on performance. Key features include waistbelt, mesh pockets, wider shoulder strap pad for messenger carry, flat profile side bottle pockets, dedicated internal iPad/tablet sleeve, and increased ergonomic fit with the Lumbar Control Point? pad. This classic keeps getting better.Removable shoulder strap Interior padded sleeve for iPad / iPod / Netbook carry Diamond airmesh foam with DWR anti-sweat finish Lumbar Control Point? pad Tuck-away waistbelt Patented Delta Compression System load adjustment Low profile side bottle pockets (fit up to 22oz) Bottom compression straps Strapette compatible (sold separately) Inner Sanctum? interior zippered compartment for small valuables Bar tack reinforcements YKK? Zippers 3M? Reflective Cord Carries up to 15 lbs. Fit Range; waistbelt: 26" to 52" Material: 450d ReForge? PET RipStop body fabric (100% Recycled), 210d RipStop Liner Size: 13 x 12 x 8 in. Weight: 1 lb. 12 oz. Capacity: 854 cu in.