I'm selling this because I have another one. Gray cotton jersey pajamas, size M, comfortable to wear. The material is like a thick T-shirt. - Brand: Polo by Ralph Lauren - Size: M - Color: Gray - Material: 100% Cotton Thank you for looking. Purchased at Isetan Shinjuku for about 20,000 yen. These were a popular, classic item for a while. You can enjoy the best comfort as pajamas or loungewear. It's a relaxed M size and doesn't constrict your body.