Made to look like the classic BLACKHAWK! 3-Day Assault Pack, the Ultralight 3-Day Assault Backpack weighs in at 2.75 pounds. Constructed with light weight 210/330 denier and 210 denier high-tenacity rip stop nylon, the Ultralight 3-Day Assault Backpack is also BLACKHAWK! Hydration System compatible. S.T.R.I.K.E. webbing all over the pack allows for additional pouches to be added on.