As the Extansions came I thought only mmmh what are the keratin bondings as tuned .... as we have read anywhere that would be the Mocroring variant is best for fine hair I ordered this .... after 2 hours work were se then there ! but after 2 days were about 12 out ... another 2 days later we were again at 15, so we decided to make all the Extansions back out and use the keratinbondings again. ... And lo and behold jwtzt hälts! Hair on Sixh are let good lure to flatten easily nevertheless blow ect !!! why the 4 stars!