Ogura ori is made of carefully selected 100% cotton material, but it may shrink slightly when washed with water. Do not tumble dry. In addition, friction and water exposure (rain, sweat, etc.) can cause color fading, color transfer, and retirement due to sunburn. Please be careful when using it in the summer or in rainy weather, or when using it with light clothing. For products composed only of fabric, the color may transfer to other clothes when washing, so please wash them alone. Light dirt should be removed with a soft brush or dry cloth. Please note that prolonged exposure to sunlight with sweat on it may cause discoloration.