UA Storm technology delivers an element-battling, highly water-resistant finish. Large, fleece-lined valuables pocket with full-length zipper on front panel. Strapping system opens up to allow access to zippered main compartment . Expandable construction provides extra space when you need it, without any extra bulk. Dimensions When Full: 17"L x 7.2"H x 15.4"W . Volume: 793 Cubic In. / 13 L.