The Anchor Dockside Swim Trunk has an outer shell made of quick-dry microfiber polyester and interior briefs made of EVAP poplin nylon that dries fast and stays comfortable. The two grommets in the rear of the trunk allow air to escape when submerged so you never have an inflated swim trunk when getting in the water, while the third grommet on the utility pocket lets water drain so you never have a pocket full of water. The super-soft interior waistband is comfortable enough to wear all day, even with a belt. Topped off with our special edition American Flag Patch and Chino Label over back pocket.