The Men's Patagonia 18 in. Hydropeak Board Short is made from lightweight and quick-drying 4.8-ounce fabric composed of 86% recycled polyester and 14% spandex with four-way stretch and a durable water repellent finish free from intentionally added PFAS. It features a performance fit with a contoured waistband designed for ease of movement and a textured drawcord at the waist to secure knots and keep trunks in place during heavier surf. One back-right patch pocket includes a key loop, drainage holes, and a flap with hook-and-loop closure, while smooth seams help prevent chafing for all-day comfort.