Item Type: Hydration Backpack Product Material: Nylon Backpack Capacity: 5L Weight: Approx. 314g / 11.1oz Capacity: Can Accommodate 1.5-2L Water Bag Product Size: Approx. 48x23cm / 18.9x9.1oz Package List 1 x Backpack This product does not contain water bags, only backpacks. 1Waterproof Fabric: Hydration backpack adopts high grade waterproof material, which can effectively isolate rainwater and protect articles. The surface is fine, the material is strong, and the feel is smooth. 2Wear Resisting: The practical and anti wear back creates a refined bag for you, and the body part is more anti wear, bringing you comfort and taste for a longer time. 3Good Features: The riding water bag backpack is made of mesh clip. It is environmentally friendly and light, tear resistant and splash proof, and durable. 4Easy and Quick Disassembly: The backpack is designed with quick loading buckle, easy and reliable assembly, and can be easily and quickly disassembled. 5Exquisite and Beautiful: The hydration pack is elegant in shape, soft and gentle in feel, and unique in cutting, the charm is still classic, and more leisure and noble.