100% Merino Wool Men's Midweight Base Layer Thermal Underwear Tops Long Sleeve Crew 230gsm plain weave fabric made from 100% of 18.5 microns new fine merino wool Our merino wool had been done Pre - shrinking, machinewash and dry. It's great for both breathability and warmth as base layer tops. Available in Men's Sizes: S to XXL,but it's Chinese's size. Select one size up as usual. This item is made in China and ship from China via ePacket. Please see the size chart in Product Description If you don't know how to select size, tell me for assistance feel free...