SIXS long-sleeve round neck jersey for children from 4 to 12 years of age. The Carbon Underwear fabric lets the skin breath and ensures thermoregulation of the body in any weather condition (outdoors or indoors). The long sleeve hugs every part of the arm to keep the skin fresh and lies between the skin and a top garment. It also slightly protects against cool drafts if a short-sleeve top garment is worn. Antistatic system : the carbon yarn isolates the static electricity caused by the rubbing of fabrics Seamless technology : seamless garment on the torso to provide absolute comfort Materials : Carbon Underwear Breathability and thermoregulation without compromise. Perfect for all seasons of the year. Antistatic fabric Breathability:\nThermoregulation: Wind protection: H2O protection: 77% Polypropylene, 15% Polyamide, 5% Elastomer, 3% Carbon Fiber