A RACE-DAY STORAGE SOLUTION. Perfect for race day, the Nike Backpack features a stabilized design that reduces movement while you run. Mesh panels at the back add breathability so you can run in comfort, mile after mile. Benefits: Side cinch straps help secure the backpack to your body. Hydration tube clip and internal pocket for a hydration bladder help you stay hydrated while you're on the run. Product Details: Hydration bladder sold separately. Dimensions: 19" x 12" x 7". Materials: 100% polyester. Spot clean. Imported. Style: N0003567; Color: Black/Anthracite/Silver; Size: One Size; Gender: Unisex; Age Group: Adult | Nike Run Backpack in Black, Size: One Size | N0003567-045