Shop our huge collection of Arena Powerskin Kneelengths! The Arena Water Instinct range of Arena racing swimwear includes a popular line of Arena Powerskin kneelengths. The Arena Powerskin Kneesuit range is available in a variety of sizes, with Arena Powerskin Junior kneesuit lines often offered across ranges like the Arena Powerskin ST 2.0 Kneesuit line. Popular choices from the Arena Powerskin Kneelength range also include options like the Arena Powerskin Carbon Air Kneesuit. Swimmer is an official Arena Australia stockist.