Polypropylene is a synthetic thermoplastic in the polyolefin family. Sewport discusses its use across sportswear, cold-weather undergarments, bags and industrial products. Its low moisture absorption helps explain its role in some next-to-skin textiles, but the polymer name alone does not reveal the finished fabric's weight or structure.

Read Polypropylene as a Polymer Identity Rather Than One Texture

Composition information is the starting point for identification. A lightweight feel or a moisture-transfer claim is not exclusive to polypropylene, so neither proves the fibre by itself. Consult the product label and construction details, particularly because this heat-sensitive material needs care suited to the finished item.