Ready-Fit covers could actually be called "semi-custom" since they are designed to provide a very good fit using incremental sizing and a hatchback silhouette. Our semi-custom program uses Block-It Series non-woven protection fabrics made by Kimberly-Clark in the U.S.A. For extended outdoor use our popular Technalon cover, made with Evolution fabric will provide all-weather protection Technalon covers (made with Block-It Evolution fabric) feature 4-layer polypropylene construction for maximum protection in all weather conditions. Often imitated, but never equaled, this U.S. made fabric is used by millions of satisfied car enthusiast around the world. Key Points: Naturally Moisture Resistant - Acid rain, industrial pollutants, tree sap and bird droppings will not harm the fabric. Breathable - Dries quickly because air can easily circulate through the fabric. Dust / Pollution Barrier - The two middle layers of Evolution fabric act as a filtration barrier against most airborne pollutants as small as 0.1 microns Impact Absorption - 4-layer thickness absorbs impacts better than any other vehicle cover fabric to help protect the finish from nicks, dings, dents and scratches. Easy To Use - Since the fabric is breathable, it doesn't trap air and "parachute" during installation and removal. It also won't shrink or stretch and retains its tailored shape. Four (4) Year Limited Warranty - Against defects in workmanship and/or the fabric becoming unserviceable during normal use.