Thin but warm. It looks grayish, but it's navy blue. It's wool, but I've washed it at home, so it might have shrunk, but it's perfect under a junior high or high school uniform ♡ Navy V-neck sweater, size M, stylish design. 100% wool - Brand: UNIQLO - Size: M - Color: Navy - Design: V-neck Thank you for looking. #UnderUniform #UnderSuit #ThinSweater #UNIQLOSweater #UNIQLOwoolSweater