SOL'S GORDON MEN, MEN’S ZIP-UP WAISTCOAT, Gauge 12 – 49% cotton – 49% acrylic - 2% polyamide, 380g/pc knit, set-in sleeves, 1x1 ribbed stand- up collar, fine contrasting stripes on the inside, 1x1 ribbed cuffs and hem with elastane yarn for greater stretch, concealed zip fastening at the front, tapered armholes, straight fit. About sizes matching, please refer to the size chart in the product documentation section.