Dreadlock extensions are synthetic extensions that can be installed and appropriately removed using specific techniques. If cared for properly, the permanent extensions can last 1-2 years.They range from semi-permanent to permanent extensions. Human hair loc extensions are more or less permanent hair extensions crocheted into your natural dreadlocks. It depends upon several factors, such as what kind of hairs were used to create them and your natural hair texture.The life span of temporary, semi-permanent, and permanent dreadlock extensions is different. Temporary synthetic dreads may last 6-12 weeks without any touch-up. On the other hand, human hair dreadlocks installation lasts up to years, depending on how you maintain and care of your extensions. Hair experts typically recommend wearing natural human hair dreads that easily last from 2-3 years. Moreover, when carried well with the right hair products, natural hair lasts for years and doesn't require wearing dreadlock extensions. To keep your extension, stay longer, avoid heat exposure, and use harsh chemicals. Make sure to keep them washed and clean to enhance their life span.