The Rapha Pro Team Thermal Base Layer Long Sleeve in Navy X-Large is a high-performance cycling garment designed for cold weather conditions. Made from polyester, this base layer top provides excellent thermal insulation to keep cyclists warm during their rides. With a compression area focused on the body, it offers a snug and supportive fit for optimal performance. Machine washable for easy care, this base layer is a must-have for any serious cyclist looking to stay comfortable and warm during their rides.