Berber Carpet Mats. New to our range for 2011 is the TruBerber material and it's the perfect complement to your XK8. This is the heaviest Berber mat available with a 48-ounce yarn weight and a 104-ounce total weight. The poly/nylon yarn blend has been specifically formulated to resist stains and fading. The colors are blended in each mat to complement most interior colors.