Trail runners, mountain bikers, and adventure racers looking for a hydration solution that's ultra-light and aerodynamic can rejoice thanks to the Camelbak Mens Racebak Hydration Jersey. Ditch your bulky backpack; it's a dinosaur in comparison to this sleeveless jersey with an integrated hydration bladder and highly-breathable design. Compression fabric gently squeezes the water reservoir to conform to your back as you empty it, so that annoying sloshing sensation is history. Pull a jersey over the Racebak and go hands-free with your hydration while others struggle with straps and packs.Full-length front zipper secures the Racebak and allows you to vent out some heatThe integrated Hydropouch compartment holds the water reservoir close to your back with an aerodynamic profileA thin pad inside the Hydropouch provides insulation between your skin and your water supplyLocking bite valve allows you to sip water hands-free from the short hydration tube that snakes over your shoulder