PLYER® is the Monahan Filaments brand name for fibers made with polybutylene terephthalate polyester (PBT). PLYER® is an economical substitute for nylon 6.6 or 6.12 in many applications. It has better abrasion resistance than polypropylene or polystyrene, but not as good as nylon. It also has excellent bend recovery, excellent solvent resistance and excellent oxidation resistance as high temperatures. PLYER® has very good resistance to sunlight. The properties of PLYER® do not change significantly between wet and dry applications because it does not absorb much water. This makes it the ideal material for many wet applications. Typical ovalities range from 1.01 for .008" to 1.65 for .070".