Kerastase Resistance for weakened hair repairs the hair fibre and has a thickening action. Kerastase Volumactive gives body and texture to fine, fly-away hair. Kerastase Resistance - Double Force - hair spray ACTION: Strengthens hair down to the root. Protects hair from product build up and protects hair follicle. RESULT: Hair becomes shiny and silky. Strong from the root repairs hair and makes much healthier. DIRECTION: Apply to dry hair, hold Double Force 10 inches away from hair.