Lite Ready Pack - 18LDurable ripstop is 3x lighter than our other fabric Can be folded and packed for travel Quick access top pocket with internal organization External elasticized water bottle pocket Large internal slip pocket Hydration bladder loop (bladder not included) Breathable mesh padded back panel and shoulder straps Sternum strap Built in key clip Water resistant coated zippers and fabric Bike light loop Backed by our 3 year warranty Main material: Dura Lite