BookRugs are manufactured with the new, patent-pending LextraFilm manufacturing technology and raw materials. LextraFilm helps create products with the same exact fine fiber coating--and for the BookRug the fibers are on the top and the bottom! Newly developed materials and technology also endows the MouseRug with a super-tough core constructed of three urethane film layers comprised of two different types of urethane, all fused together. Although we do not recommend it, we have actually not seen children OR dogs being able to tear or bite through the beautiful BookRugs! Nine of the long-time best-selling MouseRug designs have been re-created in the BookRug format and are in stock for immediate sale. We have made the pleasant discovery with the BookRug that serious book people are liking the unique stress-relieving properties of the BookRug as we caught them stroking it while reading; and they looked so relaxed! Try a few, one for yourself to "field test" of course, and a few for your best friends who like to curl up with good books too.