2l Hydration Bladder Backpack - Waterproof Outdoor Cycling Hiking Sports Pack. Stay Hydrated on Your Adventures with This Versatile 12L Backpack, Designed for Cyclists, Hikers, and Campers. Featuring a Compact Design with a Dedicated Compartment for a 2L BPA-free Bladder, This Backpack Ensures Convenience and Comfort on the Go. Crafted from High-quality Nylon, It's Lightweight, Waterproof, and Equipped with an Easy-to-use On/off Valve. Whether You're Biking, Hiking, or Camping, This Backpack Provides Ample Storage for Essentials Like Keys, Phones, and Snacks. The Adjustable Chest Strap Allows for a Secure Fit, Making It a Perfect Choice for Various Outdoor Activities. Features: - Lightweight and Durable Nylon Fabric - Easy On/off Valve for the Hydration Bladder - Ample Storage Space for Small Essentials - Adjustable Chest Strap for a Secure Fit - Ideal for Cycling, Hiking, Camping, and More - Material: Polyester - Colors: Black/Blue/Green/Pink (optional) - Size: 45.5*22.5*5cm - Weight: 0.45KG - Packing: 1 * Bike Backpack or (optional +1 *2L Bucket).