Men wear jockstraps to hold the scrotum snug against the body during physical activity, preventing painful bouncing, chafing, and potential injury. Originally designed in 1874 for Boston cyclists navigating cobblestone streets, the jockstrap has remained relevant for over 150 years because the basic problem it solves hasn’t changed: the testicles hang in a vulnerable position, and vigorous movement puts them at risk.
Support During Physical Activity
The core function of a jockstrap is simple. It consists of a supportive front pouch and elastic straps that loop under the buttocks, keeping the genitals firmly in place while leaving the backside open. During running, jumping, cycling, or heavy lifting, this design minimizes the repetitive bouncing and friction that can cause soreness, skin irritation, and groin strain over the course of a workout or game.
Unlike briefs or boxers, a jockstrap is engineered specifically for this job. The waistband is wider and more secure, the pouch is contoured rather than flat, and the open-back design means less bunching fabric in areas where a full range of leg motion matters. For exercises like squats or lunges, keeping everything locked in place allows deeper, more confident movement without constant adjustment.
Protection From Impact in Contact Sports
In contact sports, support alone isn’t enough. A fast-moving ball, knee, helmet, or kick to the groin can cause severe bruising, internal bleeding, or even testicular fracture. That’s where the jockstrap doubles as a platform for a hard protective cup, a rigid shell made of plastic or metal that fits into the pouch and absorbs blunt force.
The Urology Care Foundation recommends a protective cup for any contact sport, including football, soccer, baseball, basketball, and hockey. The jockstrap holds the cup flush against the body so it stays in position during play. Without it, a loose cup shifts around and leaves gaps, which defeats the purpose entirely.
Temperature Regulation
The testicles sit outside the body for a reason. Sperm production requires a temperature slightly cooler than core body temperature, and the scrotum acts as a natural cooling system. Tight compression shorts or snug briefs press the testicles against the body for extended periods, which can raise scrotal temperature and reduce the efficiency of sperm production over time.
A jockstrap offers a middle ground. It provides firm frontal support without wrapping the entire pelvic area in a layer of fabric. The open back allows airflow that compression shorts can’t match, which helps with both temperature regulation and moisture control during long training sessions or hot conditions.
Post-Surgery Recovery
Doctors routinely send patients home in a jockstrap after scrotal procedures like a vasectomy. The UNC School of Medicine describes a standard post-vasectomy dressing as ointment, gauze, and a jock strap, with scrotal support recommended for at least two days afterward. The goal is to limit swelling by gently compressing the area and preventing the scrotum from hanging freely, which can increase fluid buildup and discomfort.
Swelling, bruising, and minor pain are normal in the days following surgery, and a jockstrap reduces all three by keeping tissues still. The same principle applies after hernia repair or other procedures in the groin region. In this context, the jockstrap functions more like a soft medical brace than athletic gear.
How It Started
The jockstrap was invented in 1874 by C.F. Bennett, who worked for a company now known as Bike Athletic. Bennett designed it for Boston’s “bicycle jockeys,” riders who spent their days on the city’s rough, uneven streets. At the time, men wore loose-fitting pants with no built-in support, and the constant jolting from cobblestones made cycling genuinely painful. Bennett’s solution was a purpose-built undergarment that held the groin secure while allowing free leg movement, and the basic architecture hasn’t needed much revision since.
Jockstraps vs. Compression Shorts
Compression shorts have taken over a large share of the athletic support market, and for many recreational athletes they work fine. They offer moderate support, stay in place, and don’t require the mental adjustment of wearing something with an open back. But they come with tradeoffs.
Compression shorts cover the entire upper leg and press the testicles closer to the body, generating more heat. For short workouts, this is rarely an issue. For long endurance sessions, hot weather training, or men concerned about fertility, a jockstrap’s ventilation advantage is meaningful. Compression shorts also can’t hold a protective cup as securely as a jockstrap designed for one, which is why athletes in high-impact sports still gravitate toward the original.
Beyond the Gym
Jockstraps have carved out a niche in the broader men’s underwear market that has nothing to do with sports. Manufacturers now produce them in a range of fabrics, colors, and cuts aimed at men who simply prefer the fit or the aesthetic. Market research from Grand View Research lists jockstraps alongside thongs and other styles that brands are expanding to reach a wider consumer base. For some men, the appeal is comfort: the minimal fabric and open back feel less restrictive than traditional underwear. For others, it’s a style choice, no different from preferring briefs over boxers.