Designed for long foreskin. Can prevent the foreskin from covering the head of the penis without surgery. An additional privacy protection cover gives it the same appearance as that of normal underwear. A built-in anti-skid silicone ring pushes back the foreskin and exposes the head of the penis. Physical pushing back the foreskin allows it to form muscle memory. Keep the head of the penis exposed naturally. Physical touch with the fabric can reduce sensitivity and extend the time of pleasure.