Never hot or cold, sticky or 'icky', the MouseRug's surface is made of millions of individual soft nylon microfibers with air space between to provide the most beautiful and comfortable mousing surface on the planet. 25.5cm x 18cm. Discovered in 1947, the Pazyryk Rug was found in a burial mound dating from the 5th Century B. C.. It is the world's oldest discovered rug. Originally constructed of 200 knots per square inch, the Pazyryk Rug is similar to later oriental rugs with the classic central field and surrounding decorative borders with images. Geometric and floral design elements along with a procession of horses are featured in this amazingly well-preserved ancient rug. The precise origin of the Pazyryk Rug is unknown.