Built for premium performance, these men's Powerskin ST X Jammers from Arena are swim essentials for both beginners and athletes. Built with a compression fit for optimum circulation that reduces stress and strain on your muscles, while simultaneously focusing key muscle groups for more efficient movements. Durable in chlorinated water, their soft, fast-drying fabric optimises comfort in the water. With an internal drawstring to find your fit, finished with Arena branding.. Material: 71% Polyamide/29% Lycra