Global Keratin Hair Taming System Serum Elevate your hair care routine with the Global Keratin Hair Taming System Serum. Each pack contains two bottles of our natural hair serum, each filled with 50ml/1.69oz of our transformative formula. Say goodbye to dull and dry hair as our weightless serum works its magic, leaving your locks beautifully smooth and healthy. Experience the difference with our smooth, weightless formula that blends seamlessly into your hair for a truly effortless feel.