A hair roller or hair curler is a small tube that is rolled into a person's in order to it, or to curly hair, making a new .

The diameter of a roller varies from approximately 0.8 inches (20 mm) to 1.5 inches (38 mm). The hair is heated, and the rollers strain and break the of each hair's cortex, which causes the hair to curl. The hydrogen bonds reform after the hair is moistened.

A hot roller or hot curler is designed to be heated in an electric chamber before one rolls it into the hair.Alternatively, a heats the hair after the rolls are in place.can temporarily fix curled hair in place.

In 1930, created the first electrically heated hair rollers, then creating a better design in 1953.

In 1968 at the feminist, protesters symbolically threw a number of feminine products into a "Freedom Trash Can". These included hair rollers, which were among items the protesters called "instruments of female torture" and accoutrements of what they perceived to be enforced .

A hair roller or hair curler is a small tube that is rolled into a person's in order to it, or to curly hair, making a new .

The diameter of a roller varies from approximately 0.8 inches (20 mm) to 1.5 inches (38 mm). The hair is heated, and the rollers strain and break the  of each hair's cortex, which causes the hair to curl. The hydrogen bonds reform after the hair is moistened.

A hot roller or hot curler is designed to be heated in an electric chamber before one rolls it into the hair. Alternatively, a heats the hair after the rolls are in place. can temporarily fix curled hair in place.

In 1930, created the first electrically heated hair rollers, then creating a better design in 1953.

In 1968 at the feminist, protesters symbolically threw a number of feminine products into a "Freedom Trash Can". These included hair rollers, which were among items the protesters called "instruments of female torture" and accoutrements of what they perceived to be enforced .