Men's swim briefs: maximum freedom of movement

A man’s swim brief is the shortest and most fitted style in men's swimwear. Its purpose is technical: by hugging the body, it reduces drag in the water, making it the go-to for pool swimming, and it's accepted where swim shorts are not allowed.

Why the swim brief remains the style for swimming

There are two reasons for this. First, the drag: for the same effort, swim shorts create noticeable resistance, which anyone swimming several lengths can feel immediately. Secondly, hygiene, as most public pools require a tight-fitting man’s swim brief, close to the body. A well-fitted man’s swim brief doesn’t move during a dive or turn, unlike loose swimwear that fills with water.

Choosing a swim brief that lasts

For a pool man’s swim brief, resistance to chlorine is the first criterion, by far. Ordinary swimwear loses its elasticity within a few weeks of regular training, while treated fabric can last a whole season. Then check for an inner drawstring, essential for a precise fit, and the width of the waistband, which should not dig in. In terms of sizing, go for a snug fit when dry: the fabric relaxes in the water, and a swim brief that's too loose will slide down when diving. If you find the cut too revealing, the man’s swim boxer covers the top of the thigh while still being accepted in pools.