Cycling backpacks are designed to feel comfortable while cycling. In addition, some cycling backpacks have a built-in water reservoir. A proper cycling backpack doesn't chafe and provides ventilation for your back. Combining comfortable straps with great ventilation is key for most cyclists. Nearly all cycling backpacks have a hydration system or can fit one. You won't have to reach for your water bottle anymore: a sip of fresh water is always near.