The Peter Storm Men\'s Long Sleeve Thermal Crew is a sleek and comfortable baselayer which blends high performance with great value. Constructed from polyester, this short sleeve base has a brushed reverse and lightweight design which makes it a staple part of any outdoor outfit.FeaturesStreamlined and warm long sleeve thermal crew baselayer from Peter StormPolyester fabric body - this layer has a brushed reverse which provides lightweight warmth and lasting next-to-skin comfort.Versatile design - wear alone or as part of an effective layering system.Recommended activity - hiking / walking / running