CE approved \"Class 2\" compression socks With its special variable density weave, it compresses the muscle fibers in just the right points to assist blood circulation and therefore oxygenation of the tissues This prevents lactic acid from accumulating in the calf muscles, which delays fatigue and drastically reduces recovery time It can be used before starting the activity to quicken the warm-up, during the activity enhance performance, or right afterward to reduce recovery time The polyamide yarn used, thanks to its parallel construction, guarantees breathability and sweat wicking Compress-tech very elastic fiber with parallel construction to provide maximum breathability Thermoregulation, wind protection, H2O protection