"Formulated without thioglycolates or ammonia, Pin-up END CURL perm provides long-lasting, professional perms for all hair types. Whether you want tight spirals, natural-looking curls, beachy waves, or just a bit of extra bounce, Pin-up is up for the task. Pin-up perm features Cysteamine HCI, which offers a lower pH - and ultimately less damaging - perm lotion than those containing ammonia and thioglycolates. This gentle, yet highly effective FULL HEAD perm kit promises long-lasting, salon-quality curls every time. And did we mention? It also contains a Curl booster sachet for harder-to-perm hair. What's the difference between Full Head and End Curl? Not much! The Full Head perm is just designed for long hair and the End Curl perm includes slightly less product for short hair.