The Under Armour Project Rock Storm Duffle Backpack is a large black backpack with a zip closure, featuring the iconic Blood Sweat Respect theme. Made of canvas, this backpack includes a lined interior, bottle pocket, soft lined laptop sleeve, adjustable strap, and water-resistant fabric. The storm character adds a rugged and dynamic touch to the design, making it perfect for outdoor enthusiasts or men on the go who appreciate quality and style. Free with a purchase of the backpack is a $40 Storm Sack, adding extra value to this versatile and functional accessory. The sack is 19 inches in height. Sometimes you just need the sack.