Back systems motionfit trail sensifit belt belt twin skin belt pockets amp compartments 1 front element with multiple secure pockets for energy and hydration 1 back element for safety equipment and apparel carrying system extralight gear carrier locking flask lace security reflective hydration soft flask included 1 500ml 16oz fabrics elastic power mesh fast wicking fabrics 3d air mesh pack weight lb oz 497 pack weight g 141