Description: 【High Capacity and Comfort】: This Hydration Pack is a lightweight, breathable backpack with a capacity of approximately 18L. It features a double stability system for comfortable wear during outdoor activities like cycling, running, or hiking. The material used is water resistant polyester that is light, thin, comfortable, quick drying and resistant to wear and tear. 【Versatile and Durable】: This cycling backpack is designed for technical hiking and off roading, offering lasting protection suitable for various remote environments. Made from durable nylon and polyester, it features a quick release buckle and smooth zipper, ensuring long term use. 【Lightweight and Functional】: With its lightweight design, this backpack is easy to carry around during outdoor activities like cycling, hiking or traveling. It offers practicality with its functional design that includes an compartment for a 2L water bladder for quick hydration anywhere. 【Comfortable Design】: The honeycomb breathable back support provides comfort while the double thick shock absorbing anti slip shoulder strap design ensures comfortable carrying even on long trips. The high density water resistant fabric makes this backpack resistant to splashes, scratches, wear and tear making it ideal for outdoor use in any weather condition. 【Convenient Storage】: This 18L backpack measures 24cmx17cmx46cm/9.45inchx6.69inchx18.11inch and comes with an mobile phone compartment that can accommodate phones up to 6.8inch in size. Great as a Father's Day gift. Specification: Material: Polyester, Nylon Size Chart: 24cmx17cmx46cm/9.45inchx6.69inchx18.11inch Package Includes: 1 Hydration Backpack Note: Please allow slightly errors due to manual measurement and different monitors.