Product Name: ComfortMate Features: 3mm semi rigid Polypro shell. 1/8? EVA and Vinyl top cover. It comes with your choice of full length or met length top cover. You can choose between 4 degrees extrinsic post or no post. Non-skid bottom cover with full length. Non-skid heel protector standard with posting. Modeled after custom orthotics, this device is comfortable and affordable.