Curve Backpack Waterman - In Water surf backpack lets you hydrate while you surf or SUP with included 2 litre bladder slimline storage also fits food, keys, sunblock, fins, waxcomb etc while keeping weight down unique pat pending chest plate designed for ultimate support  eliminating movement while paddling, minimising resistance when duck diving. 4x independent strap adjustors for ultimate fit 2 compartments including key fob, mesh pocket