Flow mat is a fabric with double sided chopped strand mat with needle punched polypropylene non-woven as a core in the middle is a sandwich construction.

The purpose of a core in a composite laminate is to increase the laminate's thickness by effectively 'thickening' it with a low-density core material. This can provide a dramatic increase in thickness for very little additional weight.

Flow mat with Bi-Directional layer on top and chopped strand mat on bottom and polypropylene core in the middle. The bidirectional top layer provides enormous strength to the laminate.

Utek composite produces polypropylene non-woven as well, 180g/m2 and 250g/m2 as a core.