The Baseframe Pro Short Sleeve is a breathable baselayer with built in guards on the shoulder. It's designed to be worn under your jersey for low-profile coverage. It includes a removeable back insert, increasing your impact protection, while the fabric wicks away sweat as you ride and keeps you cool. The Baseframe Pro will fit snug and secure#the polymer softens to conform to your body as it is warmed by your own heat#offering minimal restrictions and maximum benefit. The more you ride, the better it feels.