2XU PWX Calf Guard & Stirrup: Engineered for active use with powerful fabrics offering unparalleled breathability, moisture management & flexibility to keep the wearer comfortable & focused. PWX Flex Highest denier delivers high power. Most flexibility & breathability. Moisture Management The lower denier (high filament) yarn on the outside draws moisture through from the high denier (low filament) yarn on the inside. In addition, the inside yarn transports water through a capillary action. This combination multiplies the moisture management performance, keeping you comfortable. Antibacterial Eliminates bacteria & body odour with a high performance nano silver application. UV Protection High Sun protection factor means long sessions in the sun wont cost you your skins health. Using PWX FLEX for optimal flexibility + movement High power denier offers extra calf + shin support Foot stirrup for added support to Archilles region Reduced muscle fatigue + damage in lower legs Flatlock seam construction UPF50+ Sun Protection Antibacterial Moisture wicking