Non-studded design protects hard floor surfaces from caster wear, spills and heavy traffic. Ideal for anytime use with any office chair on wood, tile, laminate and other hard floors. Easy-glide rolling surface provides effortless chair movement. Free and clear non-phthalate, non-cadmium formula promotes a healthy work environment while offering exceptional clarity and durability. Classic straight edge finish. The chair mat will ship rolled up in a box, as pictured in the image. To flatten out the chair mat, please follow the following instructions: add weight to the corners of the chairmat. The chairmat will gradually flatten over several hours. The warmer the chairmat, the quicker it will lay flat. Try placing it in a warm room or near a sunny window for best and quickest results.