NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank NIKE SWIM Core Solids Power Back Tank Front lined Chlorine resistant fabric Made of 80% nylon / 20% spandex