Optimat. 1/2 thick. 3' x 4'. This thick honeycomb antifatigue mat is much lighter than other antifatigue mats, which improves its ease of handling. Advanced design and construction gives sure-grip traction to prevent slippage and lost time accidents. Reversible for longer wear. OVERSIZE! This item exceeds standard freight size limits. Additional shipping charges may be applied to your order at time of shipment.