Cliff Keen Grey Ultra Mesh Referee Shirt Extra Tall. Cliff Keen's Ultra-Mesh Performance Wear material with 4" added length in the body. Made especially with officials in mind, this shirt is knit from the finest blend of natural and performance yarns. Lightweight EZ-Care Gray Pinstripe ULTRA-Mesh™ fabric keeps you cool and maintains its shape, even during the most grueling games. Shrink, wrinkle, and stain resistant for a durable, long life. Feels like soft cotton against the skin. Fortified with our woven fabric technology; it wicks moisture from the body, increasing comfort and providing an intangible performance advantage. Now approved for NFHS and NCAA Wrestling.