No heat, no glue or chemicals, so there is no damage at all. The Keratin, Weaving or Bonding can cause damage because of the heat or chemicals. The Micro Rings Technique is perfectly safe and secure.
Keratin is a glue may cause issues when heated with blow dryer or when sunbathing. When the Keratin melts it gets very messy and hard to clean. To remove such a melted glue, your technician will use chemicals. Those chemicals can be damaging or create allergies.
The Weaves are usually sewn and create big load on the roots. Weaves are very popular in the Afro- Caribbean cultures, but are bulky and easy to spot. The maintenance consist in cutting the sewn threads and re-sew the weaves up, closer to the scalp.
Tapes are very thin, almost invisible, but a glue is used to keep them in place. This glue can melt, causing a slippage or loss of some extensions. Tapes can be re-used but need to be re-conditioned again.
When done correctly, the Micro Rings Technique is invisible. They are comfortable and easy to wear. They are strong to keep your extensions in place. If the colour is well chosen, they blend well with your natural colours.