Carpet underlay; Floor mats in the nature of non-slip pads for use under apparatus to prevent slippage; Carpets, rugs, mats and matting, linoleum for covering existing floors; Carpet underlays; Chair mats; Underlay for carpets; Underlays for rugs; Decorative slip-resistant sheets of plastic for covering existing floors; Decorative slip-resistant sheets of vinyl for covering existing floors; Protective floor mats