Sunsilk Perfect Straight Shampoo is a popular hair care product that is made in Thailand. It is designed to help straighten and smoothen hair, and it comes in a 300ml bottle. The shampoo is formulated with a blend of silk proteins and 5 natural oils, which work together to nourish and protect hair while also making it more manageable. To use Sunsilk Perfect Straight Shampoo, wet your hair and apply a small amount of the product to your scalp. Massage the shampoo into your scalp and work it through your hair, paying special attention to the ends. Rinse thoroughly with water, and follow up with a conditioner if desired