The TYR Transition Backpack is designed for ultimate comfort and functionality. It features padded adjustable back straps and two large internal mesh shoe pockets for your running and cycling shoes. Other features include: Removable waterproof bag for wet items with clip for wetsuit Dual zip fully openable min compartment Large outside mesh pocket External helmet pocket with safety clip and bungee straps Two external mesh water bottle pockets 5" expandable mesh bottom compartment for a wetsuit or towel 2 padded side pockets for CD player with slit for headphone wire Reflective binding on padded straps, side pockets and front face of bag Bag Fabric: 600 Denier Poly/PVC Mesh Fabric: 100% polyester Waterproof Bag Fabric: 210 Denier Nylon/PU. Dimensions: 13"W X 19"H X 12"D Colors: Black and Navy/Grey