XLAB's Rear Hydration Carriers have often been copied, but like any copy, it is never as good as the original. With over a decade of experience designing these carriers and winning more Long Distance Triathlon World Championships than all our competitors combined, we bring to you the latest in Rear Hydration Storage. Aerodynamic tip: Rear carriers should not interfere with the air on the rider's back, but instead fill in the turbulence 'hole' behind the riders posterior, thereby reducing the rider's drag. Moving a bottle from the frame to the behind the rider, can save up to 4 minutes 11 seconds in a Full Distance race.