Warm, soft, and sustainable, the Eaton Merino Top is an extremely functional base layer made with a mix of merino wool and Tencel. Both fibers have naturally soft, absorbing, and insulating properties, making this a warm, moisture-wicking base-layer top. The soft and stretchy merino wool, along with the chafe-free flatlock seams and cuffs with thumbholes, provide total freedom of movement for this extremely comfortable base layer.