Shoulder Tee 3DF AirFit Lite EvoThe Shoulder Tee 3DF AirFit Lite EVO features soft impact foam shoulder protection. 3DF Airfit is a multi impact energy absorbing impact foam, providing comfortable, lightweight protection with maximum ventilation for airflow. The slim, ergonomic design allows for use under jerseys or chest protectors, and the MoistureCool and AirMesh wicking fabrics keep you cool and dry, even on those all day rides.