Koloa Surf Co. Beach Bag Drawstring Cinch Pack Backpack Koloa Surf Co. Beach Bag Drawstring Cinch Pack Backpack is a staple for everyday use as a cinch pack or backpack. 211 denier oxford nylon Dyed-to-match drawcord closures Reinforced bottom grommets Dimensions: 16.5"h x 14.5"w