Kenra thermal styling spray is a staple in my on-site kit for freelance hair styling jobs of all kinds. The thermal spray is a great base for creating long lasting curl. The spray is meant to hold with a rating of 19 on a scale from 1-25. Use this with a curling iron, hot rollers, and sometimes for flat iron curls. Not meant to be used for smooth, straight, movable hair styles. I like to use it by spraying it on individual sections of hair. It will always be one of my favorites!