http://tinyurl.com/mdeq8ut
Floortex Advantagemat Phthalate-Free PVC, Rectangular Chair Mat with Lip for Hard Floors, 36 x 48 Inches, Clear (PF129020LV), Amazon Exclusive
100% Free of Ortho-Phthalates, Cadmium, Lead, and Tin
The "lip" extends beyond the main rectangular area of the mat to protect the floor under the desk
Unique Floortex PVC formulation provides optimum performance and durability
Smooth back for hard floors with a textured top for ease of chair movement
Produced using 30% renewable energy and contains up to 25% recycled content