The Anmeilu Outdoor Waterproof Hydration Backpack is designed for adventurers who need a reliable and durable companion for their outdoor activities. With a capacity of about 18L, this backpack is perfect for cycling, climbing, hiking, and jogging. Made from waterproof nylon, it ensures that your gear stays dry in wet conditions. The backpack is also scratch-proof and comes with a helmet holder for added convenience. Available in Black, Gray, Green, and Brick-red, this unisex backpack is a versatile choice for all outdoor enthusiasts.