From Thule, the Stir 18L Hiking Backpack features:  Designed to support any adventure with a high weather and abrasion-resistant coated nylon fabric  Zippered main compartment opens wide to easily pack and retrieve gear  Streamline your carry around town by easily removing the sternum strap or the hipbelt  Stay cool with a breathable back panel and shoulder straps  Easily find keys, a phone, or a wallet in the top zippered mesh pocket  Stash water bottles or other essentials in the expandable side pockets  Stay visible in low light conditions with a reflective logo  Hydration compatible design features reservoir sleeve with drink tube exit port (reservoir sold separately)  Lash a carabiner, a light, or additional gear onto the integrated attachment points Coated 210D robic, 70D nylon Approx. 7.9" x 7.9" x 17.7"  Approx. weight 0.93 lb. Imported.