Discover the Swix Racex Merino Half Zip W - the perfect base layer for cold adventures! The RaceX Merino Half Zip W is specially designed for high-intensity activity, The shirt contains merino wool, which is perfect for cooler temperatures. The fabric is extremely elastic with four-way stretch without irritating seams. The open structure of the material creates a thin air barrier against the skin, providing outstanding breathability and ventilation while effectively absorbing moisture from the skin, helping to keep the base layer comfortable and regulate body temperature during intense exercise.