Why do pillows get puffier after machine washed?

Question

Like those cheap pillows that have polyester fillings and machine washable, how?

In: 0

Answer 1

The agitation of the washing machine helps to separate clumps of the polyester filling. This effect is most noticeable when you put them through the dryer, as moisture accumulation in the polyester helps to cause the clumping, and the dryer obviously removes moisture.