hey there
i was wearing for the last 5 month the TL150 and love it, but i want to know what is the deference in this 3 systems.
the most important to me is the hairline in the front to give it a neutral look.

so hopw someone can help me choose....

thanks

The 550 is as it says...French lace [ a slightly `heavier` but more robust lace] base with Swiss lace front and poly strip sides and back. The 700 is an artificial skin [latex] ...I have no experience of wearing it though. Regards, Paul.