1. material source: soybean fiber is a kind of natural fiber, which is made of soybean protein through chemical treatment and textile processing. Polyester fiber is a kind of synthetic fiber, which is processed and spun from polyester compounds.
2. Eco-friendly: Soybean fiber is considered as a more environmentally friendly choice because it is made of renewable plant materials. Polyester fiber is synthesized from chemical raw materials, using non-renewable petroleum and other chemicals.