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 inchesNote: Bags not intended for use by children 12 and under