Carbon Air Half Spats Open Back Size S Description: Arena's world-unified top racing model, "POWERSKIN CARBON-AIR2." This is a WORLD AQUATICS (World Aquatics) approved model required for participation in official competitions. Material: It uses a unique high-performance material with a structure that arranges carbon-containing threads horizontally in polyester. The "carbon band" holds the lateral power during the extension of the swimsuit, exhibiting a compression effect. Function: By making the outer fabric a single-layer structure, the pressure on the seams can be reduced, improving the comfort during wear. In addition, by dividing the lining into three panels, the freedom of movement is improved, and weight reduction is also achieved. This was worn by a child. Both the JSS mark and the Arena mark are quite faded. How about it as a spare?