Flow Designs VW MK7 Golf R Rear Valance (3 Piece Set)

Material
10mm Thick Polyethylene Composite, Bevelled edges 

Finish
HAND POLISHED SATIN BLACK 

Why do we use Polyethylene Composite for Flow Designs Splitters?
Strong, impact resistant, doesn't corrode or chip, and has excellent abrasion resistance (say from scraping on driveways and road all the time?) 

Carbon Fibre is better isn't it?
As strong and light as Carbon fibre is, it CRACKS on impact or when under load and/or stress. Clear coat will eventually fades & cracks and become undesirable.