Columbia Outdoor Adventure 38L carbon ACTION PACK This feature-rich backpack is ready for whatever adventure you throw at it with 38 liters of storage space. IDEAL DETAILS Adjustable straps for just-right support and comfort, 3L hydration compatibility, rescue whistle, side water bottle pockets, and trekking pole attachments. Features: Techlite™ shoulder straps 3L hydration compatible Reflective safety accents Compression straps External security pocket Foam padded back for comfort and support Adjustable hip belt. Sternum strap with rescue whistle Integrated pack rain fly Stretch woven side water bottle pockets Trekking pole attachments Weight: 2.0 lb 8.0 oz Dimensions: 22.25 x 14.0 x 10.25 Volume: 2318 cubic inches / 38 liters Fabric: Shell: 100% Nylon 420D Velocity Twill 100% nylon