The Chillout Backpack is part backpack, part cooler, and all comfort. With a 24-can cooler compartment, plus extra cargo space built right in, it's light on your back so you can be light on your feet. And the trail-ready back panel and ergonomic shoulder straps will lighten the load as you wander off-road. This item is constructed with a fabric zipper, not a waterproof zipper and may leak liquid contents. Features & Technology Ergonomically-shaped shoulder straps and wicking back-panel make this pack extremely comfortable for long hauls. The fully insulated cooler compartment has a sleeve that perfectly fits the custom Chillout Ice Pack (sold separately). Large ventilated front stash pocket fits extra gear like towels, bathing suits or rain jackets. Smaller front pocket keeps wallet, keys, and cell phone accessible. Shoulder strap has a removable stainless steel bottle opener for easy access. Plus two external mesh side pockets hold water bottles, umbrellas, or a fishing rod.