Flashing hydration pack with LED trim and military grade ultra tough 2 liter water bladder - Blue FULLY ADJUSTABLE chest and waist straps ensure a secure fit for all athletes. NEW and IMPROVED 2 litre bladder - Made from Military grade TPU this bladder is BPA free, odourless and tasteless. 2 L hydration bladder with bite mouth piece, dust cap, on/off valve, and large fill opening for adding ice and easier cleaning.