Minimalist feel with 5 areas to carry more of what you need: 2 quick-access angled side stretch pockets, 2 roomy secure zippered compartments, compression bungee for jacket and more. Ultra-comfortable, fully-vented AirFlow Mesh back panel. 40% lower profile patented design provides true bounce-free physics. Lumbar contoured bottle nests naturally. Comes with a custom molded 20 oz. Hydraform Bottle.