The main difference between Cold Fusion and Hot Fusion lies in the bonding method and durability:
Cold Fusion uses keratin adhesive applied at room temperature without heat, causing less damage to natural hair and is suitable for those seeking lightweight and low-damage options, though it is less durable in humid environments.
Hot Fusion, on the other hand, melts keratin adhesive with heat to create a stronger and more durable bond, making it ideal for those who need long-lasting results, but improper application may cause heat damage to natural hair, and the extensions are heavier and cannot be reused after removal. The choice depends on individual needs, lifestyle, and hair health.