The swim trunk, redefined: built like a performance short featuring the softest lining on market Introducing a new category of swim trunk—the performance swim trunk. This is two shorts in one; we took our favorite swim shorts and go-to active shorts and combined them to create the perfect short for all-day adventures in and out of the water. We’re talking 4-way stretch fabric to power everything from freediving missions to beach-side workouts, an ultra-soft, DryWetDry™ Liner used by elite triathletes, and hidden everyday carry pockets. And thanks to the versatile style and modern fit, it looks great with slides and a short-sleeve buttondown to pull double duty for a concert or date night. This is the swim trunk killer.