This is a high-neck cotton tunic from LANDS' END. It's not a T-shirt material, but a slightly thicker material, like a thin sweatshirt. It's sturdy cotton, but very soft and smooth, with a very good feel against the skin. There are slits on both sides. Size: M Width: 54cm Length: 66cm Neck height: 8cm Slit length: 13cm Cuff width: 11.5cm Weight: 450g Material: 100% cotton Color: Black #LandsEnd #LANDSEND No stains, tears, or odors. Color: Black系 (Black-based) Pattern/Design: Solid