The Korda Mock Neck Thermal LS Shirt in Dark Olive is a comfortable and functional base layer for cold conditions. Made of 92% polyester and 8% spandex, the brushed jersey material offers warmth and stretch, while the high neck offers extra protection from drafts. The long sleeves feature thumbholes for added comfort and a snug fit, making this shirt perfect for anglers who want to stay warm during the winter months.