A back protector that can double as a hydration pack Sounds pretty good to us. It must've sounded pretty good to the designers over at Alpinestars, too, because they created the Paragon Protective Shirt, a stretchy mesh jacket that comes with a CE certified back protector that can be removed, replaced, and swapped out for a hydration reservoir when long XC days call for more water than impact protection. The back panel also boasts dual cutouts that let you direct the hose either over your shoulder or under your arm, while the front left shoulder features a tube loop that makes sure the hose stays where you can reach it. As you'd expect, the stretch mesh body fabric of the Paragon is designed to sit close to your skin, the better to slide comfortably under a jersey. It's also extremely lightweight and breathable, so it won't weigh you down or trap sweat, and it conceals two padded side pockets designed to hold small gear like gloves or a multitool. Additionally, Alpinestars integrated a padded zippered pocket at the back designed to hold your phone, because if you don't get pictures of your buddy sending it, it didn't actually happen.