I could not wait to try these curlers without really believing what I do because I NEVER happens to curl my hair. I have very long hair (lower back), but I kind of curly smooth after each wash because with this length I can not have beautiful curls naturally. Once smoothed I put some hairspray in my hair, I place the curlers and let cool for 20 minutes or half an hour, and when I take them off I FINALLY curlers curls of my dreams. I tried to iron and it did not take even hairspray, I tried to make the dry hair, the smoother, non-heated hair rollers, but nothing worked until I use these curlers! I recommend them, they are really very good and very well hold in the hair. In addition there are enough for a head since even with very long hair I did not need a second batch (I still think to purchase extra second to style my girlfriends, my sisters and moms during events!)