Purpose: These are a heatless hair styling tool used to create volume, waves, and soft curls without causing heat damage to the hair. They are a popular and easy DIY alternative to salon styling. Design: The rollers are typically made from lightweight plastic with a nylon or Velcro-like surface that helps them cling to the hair without the need for pins or clips. They have vents to allow for better air circulation, which helps hair dry faster. Usage: They work best on hair that is slightly damp or dry. Hair is rolled around the curler from the ends up to the scalp and left to set. Sometimes, an extra clip is used for additional hold. Availability: They come in various sizes (small, medium, large, ) and colors to achieve different types of curls and volumes.