These pants have a soft fleece material and a built-in belly warmer. I bought them at Shimamura. Size: M-L They are fluffy and warm, but I removed the tag and found them too thick, so I haven't used them even once. Please understand that they have been stored at home before purchasing. Thank you for looking. Size...M～L I also have other belly warmer pants for sale. - Design: Embroidered with a Miffy character design - Color: Gray - Style: Short belly warmer - Shape: Ruffled hem Thank you for looking. #Chikawa #Uniqlo #Tutuanna