Features of the Gregory Nano 16 Backpack Padded airmesh breathable shoulder harnesses with one-handed sternum strap buckle and hydration routing loops Breathable die-cut backpanel and removable webbing hipbelt Quick-Pull drawcord closure with large reflective webbing puller Top zippered pocket with key clip and center buckle closure Dual side mesh pockets for water bottles and quick storage Internal hydration sleeve with universal reservoir hanger and hydration port Custom comfort-grip molded zipper pulls Reflective webbing loops for visibility Fabric Details External Material 100% Nylon Pack Body: 210D Honeycomb CryptoRip HD Nylon Pack Bottom: 420D High Density Nylon Lining: 135D High Density Embossed Polyester Suspension: Perforated CLPE Foam