Are You Ready? The CellBlock 13 Battalion Swim Trunk has a military-inspired vibe, with a masculine square cut and usable side pocket. This trunks features a stretch drawstring waistband, rubberized logo detail on the pocket and is fully lined. Fast drying nylon-spandex fabric so it holds its shape in and out of the water. It offers medium-to-minimal coverage so you're bound get at least a few heads turned in your direction.