36%Acrylic+30%Polyamide+28%Polybutylene terephthalate+6%Wool S=(US 37.5), M=(US 40), L=(US 43), XL=(US 46), 2XL=(US 48.6). Button closure Made of soft, skin-friendly high quality knitted material, cozy to wear. This v neck sweater is perfect for men to wear in cold morning, spring, fall or winter days. Button pullover sweaters features: v neck, button plackets, beefy long sleeve, slim fit design, fits close to the body, comfy, casual style, solid plain color knit sweater, very durable and preshrunk knit fabric. This casual henley sweaters suit for spring/fall, it also acts well as thermal under sweater to match coat in cold winter. Great for daily wear, casual wear, sports, work, hunting, beach, hiking, camping, outdoor, sleepwear etc. SIZING & SERVICE:Please Refer to the JMIERR Size Chart before Ordering,Not Amazon Size Chart.If you are not satisfied with the product, please contact us, we will provide you with quality service.(Free returns within 30 days)