Brand new please ask if any questions. Thank you Electric Daisy Carnival Festival. Festival-approved hydration backpack. Diamond ripstop nylon, reflective front logo & reflective shoulder strap detail. Reflective rubber patch w/ headphone slits, neon zipper taping 2.0L Water supply bladder. Insulated bladder pocket to keep liquids cold. Padded back cushion support, 3 storage compartments. Breathable shoulder straps. Adjustable sternum strap.? 17" Tall x 10" Wide x 3.5" Deep