What Fabric Shrinks in Washer

Cotton. Cotton is by far the easiest fabric to shrink during the laundry process. During the construction of cotton clothing, tension is applied to its fabrics and then the tension is released by heat from the washer or dryer, which causes the cotton to revert to its natural size.

What material does not shrink in the wash?

Synthetics. Polyester, nylon, spandex, acrylic, and acetate won’t shrink and will resist water-based stains.

What shrinks fabric the washer or dryer?

The truth is that your washing machine is equally capable of shrinking your clothes, and not just with the wrong water temperature. Agitation is what causes animal fabrics like wool, mohair and cashmere to shrink, which is why it’s best to have them dry cleaned.