Nearly all the cyberman costumes were silver in color and included items and material such as cloth , rubber diving suits , PVC , chest units , tubing , practice golf balls , cricketers ' gloves , and silver-painted Doc Martens boots . Early Cyberman costumes included items and material such as cloth , rubber diving suits , PVC , chest units , tubing , practice golf balls , cricketers ' gloves , and silver-painted Doc Martens boots .