This is a size 36, which is equivalent to a size S. It's a shirt made of soft flannel material. Flannel is a brushed cotton fabric, so it's warm to wear. It feels gentle against the skin and isn't cold when you put it on. Traditional Weatherwear, Mackintosh, Mackintosh Philosophy, Marine Francaise, A.P.C., Margaret Howell, Guernsey sweater, Kamakura Shirts, Kamakura Shirts Aqua girl, Rope Picnic, Lowrys Farm, Kumikyoku, Marine Francaise, Opaque.clip, Earth Music & Ecology, index, MUJI, MUJI Labo, Gaia's Dawn