Arena's Powerskin ST jammers for boys are designed for faster racing and improved training. Young swimmers will instantly feel the results of wearing this hydrodynamic tech suit. Integrated compression technology maximizes muscle performance, and the elastane-rich knit fabric has powerful chlorine resistance. Comfortable, durable and expertly engineered, Powerskin ST offers premiere swimwear innovation at an affordable price. Keep it classic in black with Arena logo in metallic grey.