CamelBak is the originator and world leader in hands-free hydration systems.  The first CamelBak products proved to be very popular among mountain bikers and motocross riders, because it allowed them to drink without taking their hands off the handlebars in techinal terrain.  The product began to cross over into other sports when scientific studies showed athletes drank more fluids and performed better when they wore a CamelBak.  Since then, athletes from an ever-growing list of sports and activities use a CamelBak hydration systems fro their convenience and performance benefits.