Merino upper Sensor Arrows womens uses the practical Merino Wool Upper material was created by combining two materials that complement one another excellently. The outer part is a different colour from the inner one and is produced from Merino wool, while the inner part is made of Nano Soft polypropylene. Merino wool will pleasantly warm you, regulate your body's temperature, and also prevent unpleasant odours. The inner Nano Soft polypropylene delivers the necessary durability and strength. The Merino Wool Upper material is ideal for skiing on cooler days, or perhaps spring or autumn hiking.