The Mayfly is a waxed cotton gilet, incorporating Primaloft for light-weight warmth. Mayfly is a key item of men's outerwear, perfect for layering. Stylish and practical men's fashion for both city style and country wear. Perfect worn over Dubarry men's knitwear and shirts or layer over a Dubarry men's jacket, with Dubarry leather country boots or Chelsea boots.