Long-sleeved performance base layers top with round neck. With flat seams and raglan sleeves for enhanced comfort during activity. Breathable fabric made from 100% WOOLMARK® merino wool. The Woolmark mark in textiles offers consumers a guaranteed fibre content and quality guarantee. This garment has been tested to withstand temperatures from +10ºC (low activity) to -9ºC (moderate activity) during a standardised test with simulated wind of 0.4m/s wearing a jacket, trousers, underwear, socks, shoes, gloves and a knit hat.