Tresemmé collagen and fullness shampoo gives you visibly thicker and fuller hair in just one use about this product description: want thicker and fuller looking hair? Tresemmé collagen+ fullness system infused with collagen has been created with glycerine to penetrate inside the hair. The system works to plump each stand and instantly helps hair look thicker! how to use? Start with collagen+ fullness shampoo with micellar technology, to gently cleanse your hair. Use it as the first step to get visibly thicker hair, with body and texture.