Can you shrink cotton polyester blend?

Can you shrink cotton polyester blend? While fabric and batting blends made from cotton and polyester do not shrink as much as pure cotton fabric, you can shrink them. The key to shrinking the cotton/polyester blend is adding a combination of heat and moisture.

Will 60 cotton 40 polyester shrink? Will 60 Cotton 40 Polyester Shrink? So, a 60% cotton blend shirt, is less likely to shrink in the dryer, than a 100% pure cotton shirt. With the 40% polyester material, you’ll notice almost no significant shrinkage (possibly none at all) when washing the clothing.