The Ultimax tradition of quality and innovation continues with the new UltimaxXS. It's the belt you've been waiting for to deliver peak performance and dependability never before available. CUTTING EDGE TECHNOLOGY! Ultimax XS has increased strength and is built with new heat tolerant materials. With revolutionary new compound extra strong Aramax cord and new manufacturing processes Ultimax XS will run cooler longer and faster. Extensive lab and field testing have proven that Ultimax XS can withstand the punishment that today's super-sleds dish out.