I purchased this last winter but never used it and have kept it in storage. It's Acedron, so it seems to be okay even if you sweat. I will compact it and ship it via Yu-Packet Plus. The price is quite high, so please refrain from price negotiations. Original price: 6600 yen GUNZE navy blue M size pajamas, comfortable material of 55% cotton and 45% polyester. - Brand: GUNZE - Size: M - Color: Navy Blue - Material: 55% cotton, 45% polyester - Features: Acedron series - Price: 6600 yen Thank you for viewing. #Pajamas #Loungewear #Uniqlo #MUJI #Shimamura #Gunze #Acedron