Here's my take on poly edges... Sucks!

When I was with HD I got 2 toppers with poly edge and I really didnt like for the following reasons:

1) There's a huge edge that can be felt
2) The hair is implanted into the poly - so if they don't get the direction and stance correct you wont be able to train it. With me they inserted the hair straight up and it was puffy which made it impossible to match my own finer and flatter hair
3) You can see it in sun light, there's skin showing then all of a sudden there is a band then more skin, looked terrible.
4) There was ALWAYS a density difference AND it ALWAYS had less hair right on the edge before the poly so it let a line of bald areas visible.

I tried it with my full cap (as a recommendation) and it really sucked for all the above reasons PLUS the biggest reason NOT to use it with a cap is it's not as flexible and in the nape area it made it impossible to keep attached and was very uncomfortable. It dug into my neck when I moved my head so I walked around with a stiff looking head!

So I finally just cut off that poly and now it's just lace and I can tell you the attachment is far more secure, my neck is far more flexible and it just plain feels better.

I will never ever use a poly perimeter again.

As a side note: I left 1/2" of my own hair at the temple area, around the ears and 1" on the nape. Looks far more natural but the BEST reason to leave +1" of your own hair on the nape is now you can attach the cap just above where your skin folds. This is more comfortable and gives you a better/stronger attachment because it's slightly above the area that moves and flex's.

Lee