500D CORDURA ripstop polyester,Rain Defender durable water repellent (DWR),Large main compartment with zippered mesh pocket,Dedicated 15-inch laptop sleeve and tablet sleeve,Contour-fit shoulder straps with FastDry sweat-wicking technology,Adjustable, hideaway sternum strap,Padded air mesh back panel,Adjustable, hideaway padded waist belt,2 exterior mesh pockets,Fleece-lined eyewear compartment,Front zippered organization compartment,Hydration-tube-and-bladder compatible (tube and bladder not included),Hook-n-haul system allows for attachments,Carhartt label sewn on front bottom,Capacity: 25L,Dimensions: 20.25"h x 12"w x 12"l; Approx. 1,526 cubic inches,Note: Bags not intended for use by children 12 and under