They are durable, heat-resistant, and maintain their shape at high temperatures. Once set, ... Polyester Resin: Polyester resin is lightweight rigid and resistant to chemicals.

Polyester: Synthetic, durable, wrinkle-resistant, and moisture-wicking. ... Unless labeled as moisture-wicking or performance wear, steer clear of polyester in the heat.

Hot. Heavy. Stiff. Itchy. Anyone who has worn a flame-resistant (FR) garment might use the four adjectives above to describe the experience of wearing such apparel.