Leatt Knee Protector Inserts 3DF CE Level 1/2 - Pair. CE Tested and Certified for impact protection. Energy Absorbing Impact Foam reduces forces during impact. Multi-Impact can be impacted time and time again. Super-Slim and Lightweight keeps bulk and weight to a minimum. Used for Protection on knees. Soft and Comfortable shapes to your body for best comfort. Ventilated to ensure airflow is maximized.