Specification: Name:Outdoor Cycling Backpack Size:≈ 41x25x13cm Fabric:Water-proof nylon Color:Red/ Black/ Gray Applicable occasions:Sports, Running, Travelling, Cycling, Camping , Hiking Features: -Suitable for both men and women, this backpack is perfect for any outdoor activity -Reflective Strip - Lightweight, this backpack won't weigh you down during long runs or hikes. Notes: The water bag pictured is only shown in photo , The product itself does not include the water bag ,you heed to purchase it yourself！！ For customers who need it, please contact the seller and send you a link! Welcome to consult!