SOL'S GENTLEMEN, UNISEX SLEEVELESS SWEATER, Gauge 12 - 49% cotton, 49% acrylic, 2% polyamide KNITWEAR 225 g/pc, Elastane rib 1x1 armholes and waist band for a better comfort, Fully fashioned armholes, Straight fit. About sizes matching, please refer to the size chart in the product documentation section.