Common materials include polyester and acrylic, with cotton and cotton blends also used. Some listings show blended percentages (for example, 70% polyester) and mixes that include recycled fibers (for example, 79% cotton with recycled content).
Crewneck pullovers are versatile layering pieces: lightweight open-knit or crochet styles suit warm weather, while thicker knits and fleece pullovers provide warmth for cooler months.