The Progress MB TRZ women’s polo neck with long sleeves is made from a mix of functional materials from natural fibres with properties superior to those of synthetic fibres. The outer layer is made of merino wool and the inner layer is made of bamboo fibre. The sweatshirt is soft to the touch. Merino and bamboo fibres promote better thermal regulation by providing cooling and warming effect depending on your body’s current temperature. Merino also prevents bad odours and keeps you warm even when wet. This makes the polo neck perfect for sports and outdoor activities of all levels of intensity in any weather, be it hiking or mountaineering.