High power PWX FLEX compression fabric with optimal breathability and flexibility supports the shin and calf muscles Flatlock seams to reduce chafe for greater comfort High filament yarns for dryness - wicks sweat from the skin to the fabric exterior Graduated compression to promote increased circulation for recovery Highest power denier targeted support to calf and shins Reduced fatigue in lower legs through less muscle oscillation Reduced muscle soreness Greater power output Antibacterial and UPF50+ sun protection Ensure your calf muscles receive extra support with the 2XU Compression Calf Guard. These calf guards are strategically designed for effective containment of the calf muscle when training and competing. Repeated muscle vibration is directly related to causing fatigue, muscle damage and shin splints. This versatile item allows you to use your preferred sock and can also be worn under a wetsuit making transition times faster during triathlon.