D3O protector insert, so thin & flexible you ll forget it s there! Low-key design & while maintaining freedom of movement. Set of 2 protectors suitable for the knee & elbow area. Features Certified elbow & knee protector for motorcycle gear. Developed from patented D3O-technology. Provides the quality & thoughness you can expect from D3O. Low profile design to keep to not interfere with your freedom of movement. Incorporateds airwave technology for enhanced airflow. Fit & forget: crafted to conform to your shape & move with your body. Meets level 2 requirements in ambient, wet & cold conditions.