The ColdPruf Platinum base layer men’s top combines the technologically advanced insulating and moisture wicking properties of ColdPruf Technical Fiber Polyester with the natural benefits of merino wool. With two layers of performance insulating material the Platinum base layer will keep you warm and dry in extreme cold no matter how active you are. The ergonomic men's cut with flat seam stitching and tagless printing gives you a perfect fit that feels as natural and your own skin. Having merino wool added into the outer layer brings natural anti-microbial properties to the Platinum base layer so you can reuse it more often than standard Polypropylene base layers. The Point: Performance as good as platinum.