The Road Runner is designed to keep you hydrated so you can focus on making the most out of your training. The expanded storage compartment keeps dry clothing, rain jackets, sunscreen, energy bars, maps, keys, phones, wallets, and whatever else you might need. A 2-liter hydration bladder made from BPA-free material sits inside of an insulated compartment, keeping your drinking water cooler, longer. Loopholes in the bladder keep it in place while in your pack, or it can be hung for drying. The lightweight, ripstop nylon is designed to be splashproof. The padded back and shoulder straps - designed for airflow will keep your back dry while maintaining the contour to your spine. So comfortable, you might forget you are wearing anything at all. The roadrunner is available in a variety of colors, sizes, and finishes ranging from tan to khaki to black and white.