This backpack is perfect for all your hydration needs while hiking or cycling. With a 70 oz capacity, it can hold enough water to keep you hydrated for hours. The black and gray color scheme is sleek and stylish, and the zip closure keeps your water secure. The CamelBak Classic Hydroback Hydration Backpack is the perfect addition to your outdoor gear. Whether you're hiking, cycling, or just enjoying the great outdoors, this backpack will keep you hydrated without weighing you down. The solid pattern and durable construction make it a great choice for any adventure.