THE MOST COMFORTABLE LINER: Forget the scratchy mesh of the past. We’ve integrated an ultra-soft, quick-dry liner inspired by pro-level bike bibs for maximum comfort. It features a hidden phone pocket, keeping your everyday carry secure. You will never go back to mesh lined swim trunks. ADVENTURE-READY VERSATILITY: We call these the "swim trunk killer”. These mens shorts are engineered to transition seamlessly from a morning longboard session to a post-surf drink. With a modern fit and versatile 5” or 7" inseam, they pull double duty as high-performance activewear, swimsuit and a sharp looking summer short. SUSTAINABLE 4-WAY STRETCH: Crafted from a premium blend of recycled polyester (sourced from water bottles) and spandex, these trunks offer unrestricted 4-way stretch. Whether you’re paddling out or stretching through a yoga flow, this board short keeps you moving freely. SMART STORAGE & UTILITY: Equipped with mesh-lined side pockets. The back snap pocket features an internal key bungee and a reflective hit for low-light visibility, ensuring your essentials stay put during high-output "surf 'n turf" workouts. BUILT FOR THE LONG HAUL: These swim trunks are built for the guy who puts his gear through the paces. Featuring a comfortable elastic waistband and adjustable drawcord, these trunks are backed by Proof’s commitment to durability. Rugged enough for the trail, refined enough for the boardwalk—these are the only shorts you need to pack. The Performance Lined Swim is a new category of swim trunks. These are two shorts in one; we took our favorite swim shorts and all day 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 longboard sessions to yoga to surf ‘n turf workouts, an ultra-soft liner used by elite triathletes, and everyday carry pockets. And thanks to the versatile style and modern fit, it looks great with slides and a short sleeve button down to pull double duty for a concert or date night. We call it the swim trunk killer.
