OK it all comes down to the ventilation.

It's a freestyle with spikey/flatback front. Light/medium density. graduated front.

Colour is #3 which is pretty close to my real hair colour. So Blend is nice with a little bit of Product. Don't use anything special for product just whatever i find here & there on special.
Right now i'm using either Scwarzkopf power 'n' touch anti crunch gel. Or Taft Remodelling paste

Paul- no build up, i wash my hair every2-3days which keeps build up down i guess. The fit is spot on! no creasing at all! I cut this out of an 8x10 which although i'm not actually that size but I think it helps to cut out of a bigger stock.

I tape all around the perimeter with ST & leave about a 1cm at front hairline which i glue with Ghost bond which gives me about 2-3 days hold.