What does Acrylic mean?
Synthetic fibre made from a polymer by combining coal, air, water, petroleum and limestone.
Heddels explains Acrylic
Acrylic is wool-like, pills easily, lightweight, soft, and warm. It is often used as a substitute for cashmere as it is more inexpensive and not found in raw denim.
Scarves are one garment that use acrylic fibres: