When styling your seamless extensions with high heat, we recommend to set your tool at 80C\/176F degrees or lower. Anything higher may run the risk of damaging the hair, as with any other clip-in extensions. This is because the hair is not being revitalized at the scalp like our own hair is, and over time excessive heat and high temperatures may cause wear and tear to your set, and could potentially loosen the silicone bond with the hair. Generally speaking, heat will not damage the base of the weft unless it is very high. \nOne of the best thing about our extensions? They don’t need to be styled at a high heat temperature any way to see results. Our extensions will curl and straighten with ease using low heat.