Therapy G Hair Volumizing Treatment Spray is designed to make the hair thicker and fuller, create body and bounce, and to instantly make hair look and feel good. This formula delivers Tryptobond Guard to individual shafts of hair. Creates thicker, fuller, flexible hair. Strengthens and nourishes hair shaft and improves hair texture. Tryptobond Guard is a patented cationic (attaches itself to the hair) ingredient designed to protect the hair from sun exposure damage, such as breakage, styling stress, surface damage, and color changes.