Fabric material about paint roller cover you need knowAug. 23, 2017
Synthetic is the most common and most frequently used category of paint roller cover fabric. Usually nylon, polyester, or a combination of the two is used. The quality level can vary greatly within this category, from low end economy models to high end covers designed for professional painting contractors.
Wool was the fabric for the original roller covers. Wool covers are also commonly referred to as lambskin and sheepskin. They will typically carry about 40,000 to 60,000 fibers per square inch vs. synthetic which can be anywhere from 3,000 to 6,000. While more expensive than synthetic fabric roller covers, some painting contractors prefer wool fabric covers because they hold more paint and have better release and clean up faster.
Mohair fabric covers typically combine natural goat hair with synthetic materials. Mohair paint roller are preferred for producing glass-like finishes on smooth surfaces. They are great for enamels on doors and millwork as well as clear coatings. They are typically very low nap (from 1/4" to 3/16") and hold and release better than manmade fibers.