Choosing between these two rollers mostly depends on how much time you have and how well your hair can hold a curl. Velcro rollers don’t use any heat, but it’s important to wear them for as long as possible to get the most out of your style. For those who have trouble holding a curl or might be in a rush, hot rollers only need to be in your hair for 10-15 and help solidify the curl shape.Editor’s note: Do not use velcro rollers on wet or damp hair, it will tangle and become difficult to remove later.