Purchased in December 2025. Only the outer bag has been opened to check the contents. Retail price: 5500 yen This product is for salon professionals only, so please refrain from purchasing if you are not a technician. This is a non-alkaline product with thioglycerin and thioglycolic acid as the main ingredients. As it can cause sensitization, care must be taken when handling the product! It allows for a strong curl and a moist, glossy finish. This is a stable product.