The Curlformers patented curler system is gentle on hair and produces long-lasting results. The Top Up Barrel Curls Pack for medium to long hair is ideal for completing your Curlformers collection and creating perfectly defined, soft and extra large curls without the need for heat which can so often cause damage. Curling irons are hair curlers that don't create thermal curls, are easy to use, and can be used on any hair type, from frizzy to naturally curly to stubbornly straight hair. "