Purchased recently (July 19th) at a drugstore to use on hair that gets frizzy in humidity. It didn't have much effect on my strong, naturally curly hair, so I'm selling it. I only used an amount about the size of a single grape. I stored it in the bathroom sink area after use. I don't keep it in the bathroom, so the storage condition is fine. I appreciate your understanding that this is a used item. Hair mask that repairs hair with corset technology. - Product Name: Gyutto Corset Hair Mask - Made in: Japan - Features: Hair repair effect using corset technology - Contents: 200g Thank you for viewing.