Medium compression technical socks. Its RESISTEX BIOCERAMIC fabric has a high thermal insulation coefficient, which is why it is capable of maintaining constant temperatures even in extreme weather situations. Bioceramics can produce FIR / far infrared rays), that is, short-length electromagnetic waves capable of penetrating up to 4-5cm in the human body, making an essential contribution to the growth, development and relaxation of contracted muscles, thus ensuring a truly absolute well-being. Due to their particular structure, these socks maintain constant effectiveness over time, even after multiple washes. The bioceramic fiber guarantees long-term freshness during exposure and sports activities. CAREFUL -Machine wash: 30º -Do not use a dryer -Do not iron -Do not use bleach. Size guide: Size S 37/39 Size M 40/42 Size L 43/45