2XU Calf Guards Size Chart Lighter than calf sleeves, the 2XU Compression Calf Guards are great for training or competitions. Designed to be exceptionally effective for the containment of the calf muscle, helping prevent muscle vibration that is directly related to causing fatigue, muscle damage and shin splints. A versatile item that allows athletes to use their preferred sock and can also be worn under a wetsuit making transition times faster during triathlon. Extremely powerful, breathable and engineered with UPF50+ sun protection, your legs will definitely thank you! Features: - 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. - Antibacterial and UPF50+ sun protection.