We merged the best features of a pack and a cinch to create this versatile backpack.; 300 denier polyester, 210 denier polyester; Drawstring top closure; Interior hanging pocket with hook and loop closure for easy access to valuables; Spacer mesh comfort straps with built-in grab handle and reflective trim; Lightly padded back for structure and comfort; Front slip pocket for easy decoration; Reflective webbing tab on slip pocket and side mesh beverage pocket; Dimensions: 20"h x 15"w x 5"d; Approx. 1,500 cubic inches Note: Bags not intended for use by children 12 and under.