What it is: A single-use product that smoothes hair for lasting manageability and frizz reduction. What it does: Formulated with patent-pending Concen-straight Technology(TM), which helps maintain hair's natural integrity, this formula smooths hair for manageability and frizz reduction for up to 30 shampoos. Concen-straight was created to let you style your hair as straight as you like it. Once you've given yourself the treatment, it's up to you how straight you'd like to style your hair. Flat irons render hair pin-straight, blow dryers create body and movement, curling irons create smooth shapes, while air drying reveals natural, more manageable texture. What it is formulated WITHOUT:- Parabens- Sulfates- Synthetic Fragrances- Synthetic Dyes- Petrochemicals- Phthalates- GMOs- Triclosan What else you need to know: Hair type and condition are extremely important to consider before you use Concen-straight. Though gentle, this treatment alters bonds and exposes hair to high heat. For clients who color their hair: As with any chemical treatment, this treatment may cause color fade, especially in redder tones. In order to avoid shift in color, you must use Concen-straight first, and then wait two weeks to have your hair colored. For clients who chemically straighten their hair: Wait six weeks after any professional straightening service to use Concen-straight Smoothing Treatment.For clients who have fragile or bleached hair: Hair that has been bleached, double-processed or over processed may be fragile. Bb.Mending family (Bb.Mending Shampoo, Conditioner, Masque and Complex) is recommended for use to repair fragile hair until strands feel strengthened before using Concen-straight Smoothing Treatment. If you aren't sure, ask your stylist. Additional considerations: This product contains sulfites. If you are sensitive or allergic, consult a physician prior to use. Expect a noticeable odor: Like many treatments, Concen-straight contains technology that is detectable by smell. Dampness can release a smell for a few days after application. It will disappear completely after several shampoos. You may also experience possible color fade: As with any chemical treatment, this treatment may cause color fade, especially in redder tones. In order to avoid shift in color, you must use Concen-straight first, and then wait two weeks to have your hair colored.