The SMAI WKF approved belt is a homologated belt approved for competition use in all WKF  sanctioned events internationally. Available in red or blue, the belt has been manufactured by  machine without fault. Constructed from poly-cotton, it is 100% colour fast which ensures no  bleeding of colours or staining of your Karate uniform. SMAI Karate belts are used by  professional fighters all over the world. High quality SMAI belt - 4.5cm in width with 11 rows of  stitching per belt and filled with rigid filling for a quality finish. This model is 4.5mm in  thickness.