ZIHAN Men's Bamboo Fiber Tight Crew Neck Long Sleeve Medium Black 94.9% Regenerated Cellulose Fibre and 5.1% Spandex 100% Brand New and High Quality Color: Purple, Coffee, Blue, Green, Black, White, Royal Blue Extremely quick drying so you can wash on the go and pack fewer long sleeve It is good to reduce the stimulation to the skin You select size is US Size,but we send product tag size is China Size.The China Size is bigger one size than you order.Because of the China size is about 1 size smaller than US size.And our company product tag is printed in China size only.For example,you order size "M", we will send you the item with China label size "L".Thanks!