Hello my first piece had poly all arround and the only plus side was the attachment. Poly does help with the attachement but is murder on the appearence of the hairline. Even if you keep your hairline covered you always feel a ridge where the hairline starts. I now have one piece with no poly and one piece with poly on sides and back. In hot humid weather I wear the poly sides and back. For me it helps with the attachment but everyone is different. I guess you will only really know with trial and error.