Vitrazza Glass Office Chair Mats are the Premium Alternative to Worn-out Plastic Mats. They're made of Super-Strong glass so they'll never dent!We're the leader in Glass Office Chair Mats, an innovative application of tempered (or toughened) glass that never dents and allows for a smooth, easy glide with any rolling office chair.Vitrazza offers the only Glass Chair Mat on the market that is both toughened (heat-treated) for strength and coated with Invisible Shield Pro 15 to resist fine scratches. This proprietary combination of toughened strength and a coating, we call Tufver Glass™.