Description:Comfort: This Hydration Pack is a lightweight, breathable backpack, comfortable to wear during outdoor activities like cycling, running, or hiking. Made of nylon cloth that is lightweight, comfortable, and resistant to wear and tear.Reflective Design for Safety: The hydration backpack has a reflective design that enhances visibility in low light conditions making it for night time activities. Size25cmx6cmx39cm/9.84inchx2.36inchx15.35inch.Organized Storage: This hiking backpack can accommodate your essentials while keeping them organized, holds cell phone, keys,water bladder, etc. NOTE:Not Included Water Bladder.Convenient Design: The backpack features convenient side storage pockets and a top handle strap design for easy carrying by hand when needed, great for long outdoor adventures.Adjustable and Versatile: It features quickly disassembled and adjusted making it easy to use. Hydration Backpack is designed to fit snugly against your back for maximum comfort and flexibility.Specification:Material: Nylon ClothSize Chart:25cmx6cmx39cm/9.84inchx2.36inchx15.35inchPackage Includes:1Hydration Pack (Not Included Water Bladder)Note:Please allow slightly errors 1-2cm differences due to manual measurement.