Description: 【Backpack Attachment】Outdoor water bottle holder for backpack shoulder strap, easily attaches to both sides of your backpack shoulder straps, allowing quick access to your water bottle or essentials 【Premium Materials】Crafted from high strength nylon and PVC waterproof mesh fabric, this water bottle pouch is tear resistant, sturdy, not easy to break and built to withstand harsh outdoor conditions 【Secure and Stable】The water bottle bag carrier features a double layer elastic drawstring closure and reinforced hook system for extra stability, ensuring your items stay firmly in place even in rugged environments 【Portable Design】The portable and lightweight water bottle holder provides additional space for carrying small items like phones or snacks without adding bulk to your backpack, easyto in stall 【Wide Applications】The outdoor backpack strap water bottle holder is suitable for hiking, travel, cycling, running, fishing and other outdoor activities Specification: Material: Nylon PVC Size Chart: 9cmx9cmx17cm/3.54inchx3.54inchx6.69inch Package Includes: 1 Water Bottle Holder Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.