Designed to offer maximum protection while minimizing bulk and weight . Moisture wicking micro-lycra sleeve with nylon mesh forearm panel for increased airflow . Custom molded D3O elbow inserts designed by and exclusive to Fox . Slip-on design for reduced bulk . Silicon grip top and bottom to hold the guard in place . D3O elbow inserts are removable for convenient and quick washing . Elbow inserts are EN1621-1 Level 1