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The Arena Powerskin ST 2.0 jammer is the latest version of this best selling Fina approved racing product. Ideal for any serious competitor due to the technology built in and perfect for swimmers of all levels with three high-tech knit fabrics and a durable lining for optimal muscle support and freedom of movement. All of the ST 2.0 seams are flatlock for a snug fit against the body, and the new ergonomic seam placement improves body and leg position in the water. Enhanced support and comfort plus a sleek finish make the Arena Powerskin ST 2.0 jammers a high performance swimsuit with exceptional hydrodynamics. These FINA approved Black Jammers offer swimmers a comprehensive racing and training solution.