The Women's Gypsy Base Layer Thermal Set is a popular choice among Amazon shoppers. This set includes a long-sleeve top and leggings, both made from thermal fabric that provides excellent insulation and warmth. The base layer set is designed to be worn under clothing, providing an extra layer of protection during cold weather. It is perfect for outdoor activities such as skiing, snowboarding, and hiking. The set is available in various sizes and colors, allowing you to find the perfect fit and style for your needs. With its combination of functionality and comfort, it's no wonder that this base layer set is a best seller on Amazon.