What is the difference between the polyester fabric and the nylon in the jacket?

What is the difference between the polyester fabric and the nylon of the jacket? The fabric of the jacket and the polyester fabric that is not easily deformed after washing are elastic, not easy to be torn off, the hand feels smooth, the color is brighter than the nylon, the fabric has no crease after folding, and the elasticity is good. Durable and waterproof. It is airtight and does not absorb sweat; knitted and cotton are comfortable to wear and not wearable; cotton and polyester are somewhere in between.

Polyester and nylon are pure fiber fabrics. These fabrics have poor hand feel and poor air permeability, but the clothes are well formed and wear-resistant.