Low-profile baselayer guard with D3O® impact protection The Baseframe Pro Short Sleeve D3O® 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 EN1621-1 level 1 back and shoulder certifications D3O® foam inserts are vented and conform to body for maximum comfort Moisture wicking mesh main body fabric helps keep you cool and dry Specifications Exceeds EN1621-1 level 1 back certification including high and low temperature conditions Removable CE certified D3O® Viper™ back insert features world leading impact protection technology Large perforation and flex grooves in the back foam contours and flexes with rider movement EN1621-1 Level 1 D3O® shoulder inserts for additional protection Body heat activates (softens) the polymer to conform to body Moisture wicking, open stretch mesh for breathability Certifications Exceeds EN1621-1 level 1 back certification EN1621-1 level 1 shoulder inserts for additional protection Note: No technology or product can fully prevent the risk of injury or death