It's no secret that I'm crazy about Frederic Fekkai hair products evidenced by how often I've written about them and have sung their praises. However, I don't think I've ever written about one of the best Frederic Fekkai products I use. It's not only one of my favorites...but the favorite of many others as well, considering all its 5 star ratings. If you have hair breakage from over processing/coloring heat styling or any other environmental stressors; you will most likely benefit from the amazing protein infused properties and other quality ingredients of Frederic Fekkai Protein Rx Anti Breakage Treatment Mask. The superior hair mask restores and strengthens weakened damaged hair. Its soy and milk proteins help to revitalize and repair and eliminate breakage. It also prevents further damage. Additionally, hair appears shiny, manageable and extremely healthy. And even more impressive...it does all this without weighing the hair down like many other deep conditioning treatments. It's recommended to be used weekly or as needed which gives you flexibility in terms of what works best for your specific needs. I use it twice weekly due to my sun-bleached hair and over-use of heated styling tools. And now my hair looks amazing!!