Mack Weldon® for J.Crew Prime Cotton trunk

a brand-new rib-knit fabric we developed exclusively with Mack Weldon. It combines durable long-staple cotton with climate-regulating nylon for a fabric that's stronger and cooler than regular cotton. These trunks also feature Mack Weldon's signature no-roll waistband and legs that won't ride up, and best of all, they're available only at J.Crew.