The Thermajane Ultra-soft Heat Thermal Crew Neck Set is a women's base layer set in size XS, featuring a crew neck style and long john design. Made from a blend of 92% polyester and 8% spandex, this black set is lightweight, fleece lined, and moisture-wicking, providing both comfort and warmth. The 4-way stretch material allows for a flexible and comfortable fit, making it an ideal choice for winter sports or outdoor activities.