Basically Freestyle venting ties the knots in more loosely to the lace, so the hair lies not in a pre-set/particular direction, so it can be `trained`by the wearer into whatever[ general] style they like....obviously for more precise styles like swept-back or spiked front it`s best to have the system made in the desired style [ `default` if you like] Once a freestyle system `settles in`after 2 weeks or so, and has been `trained` into what way the wearer generally styles it, knot-sealer can then be applied to `lock`the knots and prevent them becoming undone and hairs shedding....that will also have the effect of `setting` the system into whatever style/ direction the hair is lying in at the time the sealer is applied.