How to Pick a Mat to Use Under an Office Chair | Overstock.com
Cleartex Ultimat Chair Mat for Deep Pile Carpets (over 12mm) | Clear Polycarbonate | Rectangular
Office Chair Mat for Hardwood and Tile Floor, Black, Anti-Slip, Non-Curve, Under the Desk Mat Best for Rolling Chair and Computer Desk, 47 x 35 Rectangular Non-Toxic Plastic Protector, Not for Carpet :