HairFIX Pro is the new most advanced and reliable Hair Extension System that uses Thermal glue (ATM). HairFIX PRO together with H7 pre-bonded human hair locks ready to use will make you save lots of time. Tiny and nearly invisible applications. A reliable and long lasting system that do not damage the hair. HairFIX PRO has been long-time tested and is one of the most reliable Extension Systems available.