Cold Fusion technology uses no heat. Whereas the original Great Lengths 3200 Thermal method utilizes heat to soften the bond so the bond can be molded around the group of natural strands that the bond is attaching to, the Ultrasonic 5000 Cold Fusion method utilizes ultrasonic wave. This wave or “vibration” action generates heat within the bond and this allows the bond to surround each individual strand within the group of natural strands the bond is being attached to. This added bonding security allows the stylist to mold the bond attachments into “flat” bond formation without compromising the bond “seal” to the client’s hair. Of course, traditional “round” bond formations with the Ultrasonic 5000 are possible too. This gives the stylist more application options to truly customize their Great Lengths Services to each client’s specific need and desired result.