Foam-padded Tongue undercollar with new soft durable microfiber suede lining. Spandex tongue straps that hold the tongue in place for secure fit. New comfort level with replaceable dual density Performance footbed. European design and look. SST 6 exclusive extended base width on the outer side of the sliding foot providing a wider, flatter side surface. Four interchangeable slide soles and four interchangeable braking heels on the sliding foot supplied with the shoes. Power Pivot™ Push-Off Sole with Duratip™ Traction Toe. Package includes one sole cover to protect your slide shoe from contamination off the lanes and protective silk twill shoe bags for both shoes.