Description of Marmot Sweetwater Lumbar With a water bottle pocket and thoughtful waist and accessory pockets, the versatile Sweetwater has enough room for most lightweight hikes but not so much to make it too bulky for travel and aerobic outings. Features: Weight: 13 ozs / 369 g Main Material: 420d Nylon Main Material: Ripple Rip P300d Volume: 450 cu in / 7 litres Airflow™ Back Panel Airflow Back Panel Front Pocket Accessory System Main Pocket Accessory System Media Port Waist Belt Pockets For Convenient, Quick Access Water Bottle Pocket