Specification: Name:Outdoor Cycling Backpack Size:≈ 45x23x8cm Fabric:Water-proof nylon Color:Blue / Black/ Orange 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! Please note that this backpack does not contain water bags, and water bags need to be purchased separately! Customers in need please contact the seller to push the link for you！Welcome to your inquiries！