Jockstrap

A jockstrap, also known as a jock or athletic supporter, is a type of men's undergarment designed for use in sports or other activities, such as during the recovery from a vasectomy, although some men wear them for comfort.

A typical jockstrap consists of a wide elastic waistband with a support pouch and two straps extending from the base of the pouch around the buttocks (which it does not cover, unlike briefs or boxers) to attach to the waistband. The pouch, in some varieties, may be fitted with a pocket to hold an impact resistant cup or box to protect the testicles and/or the penis from injury, from e.g. baseball practice.