Description: The hydration backpack provides a tight, comfortable and non-swaying fit that won't shift even during running. The hydration vest with ultra-light design for maximum support and minimal burden Specification: Fabric: Polyester + Nylon Color: Rose,Reddish Orange,Black ...Description: The hydration backpack provides a tight, comfortable and non-swaying fit that won't shift even during running. The hydration vest with ultra-light design for maximum support and minimal burden Specification: Fabric: Polyester + Nylon Color: Rose,Reddish Orange,Black,Drak Blue Weight: 190g/6.7oz Recommend chest circumference: 68-130cm(26.7"-51.2 ") Package Content: 1* Running Vest Hydration Packs Sports & Rec