The NIB Seirus Heatwave Crew Top Base Layer in Carbon is a men's medium sized base layer top perfect for winter sports activities. Made from a blended fabric, this long sleeve top features moisture-wicking technology and reflective accents for added safety during outdoor adventures. The solid carbon color adds a sleek and stylish look, while the reversible design offers versatility in your styling options. Easy to care for with machine washable instructions, this top from the trusted brand Seirus is a must-have for any winter athlete.