Bring extra snacks with you for the long haul, or enjoy a shorter, scenic bike ride with CamelBaks 2.1L Velocity Hydration Pack. A detachable saddle bag holds 30cu in of cargo to keep you going for the long haul. When you dont need the extra space, stream-line your pack and leave the mid-size saddle bag at home. CamelBaks panel design channels air between your back and the pack to help keep you dry. As you heat up on the bike trail, the Velocity Packs water reservoir insulation keeps your liquid cool. An anti-microbial technology in the hydration system eliminates almost all common bacteria and fungus, so your water stays clean.