Whether you're riding to school, work, or the local farmers market, you need a secure way to carry your stuff. The Ortlieb 24L Velocity Design Pack secures your groceries or supplies, and protects them with waterproof polyester. This pack has a roll-top closure that seals out water if you should have the misfortune of being caught in a shower, and also ensures that nothing will fall out in the event of a crash.