The Jack Murphy Heritage Collection jackets and coats are 100% waterproof and windproof. The outer shell fabric is 100% polyester and with air vents placed under the arms to help with breathability. These coats are ideal for walking in bad weather conditions but high levels of exercise would cause perspiration. Heritage Range: Womens; Malvern Waterproof Coat, Cotswold Waterproof Jacket , Oxford Waterproof Jacket Mens; Lambourne Waterproof Coat, Kingston Waterproof Jacket