The Terramar Women's Thermasilk Base Layer Bottoms are a popular choice for women seeking a lightweight and breathable base layer. These bottoms are made from 100% pure silk, providing a luxurious and soft feel against the skin. The Thermasilk fabric is designed to regulate body temperature, keeping you warm in cold weather and cool in warm weather. These base layer bottoms are perfect for layering under your clothing or wearing as sleepwear for added warmth and comfort.