The Seirus Heatwave Winter Weight Base Layer Women's SM Crew Top is a solid black top with long sleeves and a crew neck design, perfect for activewear during the winter season. Made by the brand Seirus, this base layer is ideal for activities such as hunting, mountain climbing, skiing, cross-training, and more. The top is machine washable and features a warm design, making it a practical and comfortable choice for outdoor adventures in cold weather.