KSD Flat Iron Free Express smoothing treatment provides comparable results to traditional salon Brazilian-type keratin treatments when it comes to reducing curl & wave, removing frizz and smoothing hair – but without the harmful chemicals AND without a flat iron! And, because our smoothing treatments work from the inside out to strengthen and fortify, your hair is not only smoother and straighter, but also healthier looking and more manageable. Go from straighter to curls and back again at any time. 2 year shelf life