Built for the Water. Designed for Performance.

Whether you’re diving, surfing, snorkelling, or paddling — the Mares Trilastic Long Sleeve Rash Guard is engineered to keep up. Featuring the iconic Mares Trilastic look, this long sleeve rash guard delivers UPF 30+ UV protection, a sleek four-way stretch fit, and flat-lock stitching that won’t irritate your skin — worn alone or layered under your wetsuit for added thermal protection.

UPF 30+ UV Protection – Shielded in the Sun

The lightweight fabric provides UPF 30+ ultraviolet protection, blocking harmful UV rays during extended time on or in the water. Whether you’re on the surface between dives, paddling out on a sunny morning, or spending hours at the beach — your skin stays protected without the need for constant sunscreen reapplication.

Flat-Lock Stitching – No Chafing, No Marks

All seams are sewn with flat-lock stitching — a technique that lays seams completely flat against the skin, eliminating the raised ridges that cause chafing and pressure marks during extended wear. Comfortable from the first minute to the last, whether you’re in the water for 30 minutes or 3 hours.

Standalone or Under-Suit – Versatile Layering

Wear it on its own for protection from UV rays, jellyfish, and biting critters in warm water conditions. Or wear it underneath your wetsuit or drysuit — the sleek 85% polyester / 15% spandex blend allows your exposure suit to slide on effortlessly while adding a meaningful layer of additional thermal protection in cooler water.

Four-Way Stretch – Freedom of Movement

The 85% polyester / 15% spandex Trilastic blend stretches in all four directions, moving with your body rather than against it. No restriction, no bunching, no pulling — just a second-skin fit that stays in place through every stroke, kick, and surface interval. Ideal for diving, surfing, kayaking, paddleboarding, and all water sports.

What’s in the Box

Mares Trilastic Long Sleeve Rash Guard × 1 | Gender: Men’s | Size: XL | UPF: 30+