Condensation and the rust it brings on are all too often the results of ordinary machine covers. These HTC covers are of a strong, durable cotton sheeting that is skip-coated with a special plastisol. The resulting cover is water resistant, but breathes so condensation doesn't collect. The covers have the hems rolled around the entire perimeter, with a rubberized magnet sewn into each corner. These durable silver-colored protectors are useful around the house, but are sized for woodworkers.