mixed-fiber
Cotton-polyester, for instance
Mixed-fiber describes textiles or fabrics made from a blend of different fiber types, such as cotton and polyester or wool and synthetic materials: a mixed-fiber sweater that's easier to care for than pure wool.
The term appears on clothing labels and in textile specifications.
Mixed-fiber blends often combine the desirable properties of each component—natural breathability with synthetic durability or wrinkle resistance.