Extreme Anti-Snap leave-in treatment gently smoothes the cuticle, reduces friction from brushing and helps fortify hair that's prone to breaking, splitting or snapping off. For hair that is up to 4 times stronger. Redken Extreme strengthens and resurfaces chemically and mechanically distressed hair. Redken's exclusive Interbond Conditioning System delivers a unique 3D Repair Complex to fortify hair so it looks and feels healthier with increased manageability and shine.