Simply Smooth xtend keratin replenishing finishing gloss is a botanically blended, keratin infused, weightless finishing gloss. This sodium chloride free shine gloss is formulated to benefit all hair types whether or not a Simply Smooth keratin treatment has been applied. When used after a Simply Smooth keratin treatment, xtend keratin replenishing finishing gloss will also help prolong its duration along with adding incredible shine and humidity control.