Rapha Women's Thermal Base Layer Using Polartec® technical performance fabric, the Rapha Women's Thermal Base Layer delivers excellent thermoregulation by combining effective moisture management, breathability and fast drying. It helps move moisture away from the skin as your effort increases, reducing the damp, clammy feeling that can make winter riding uncomfortable. This dedicated crew-neck design provides the insulation you need while allowing greater versatility across changing conditions. Comfortable, streamlined layering The soft, textured fabric feels comfortable against the skin, while flatlocked seams help reduce irritation and minimise bulk beneath your outer layers. Designed to sit close to the body, the women's Rapha Thermal Base Layer fits neatly beneath all Rapha jackets and long-sleeve jerseys without restricting movement. Wear it beneath a Rapha long-sleeve jersey for cool rides around 5?13°C, or add a Rapha jacket over the top when you need greater protection and warmth as temperatures fall.