KMS by Gerald Wells Hair Professionals. This gentle, soothing shampoo is perfect for sensitive scalp. It is fragrance free and dye free. This shampoo works delicately to rinse away any impurities, while calming and soothing your irritated scalp. This is suitable for all skin types it leaves your hair glossy and healthy. This shampoo is formulated with IOPS (Inside Out Perfecting System) that penetrates into your hair, making it more vibrant and healthier.