Floortex® Vinyl Rectangle Chair Mat Carpets up to 1/4" 30" x 48"

I bought two of these things because I have a pretty wide desk and need to be able to roll from end to end. The nice thing about my carpeting it that there is no padding between it and the actual floor. What this means is that these things should last a while (as in years) as opposed to cracking and falling apart within a few months. Take this advice for what you will but know this: These plastic floor mats work well when there is no padding under your carpeting. If you have padding then you might want to look at something else.

Protect your carpet from the movements of your desk chair with this excellent carpet mat: it is made tough yet is easy on the carpet. Also, unlike other mats, the surface isn't so slick that you feel as if you are on an ice skating rink! (Note, one thing, tho: it is really for low pile carpets.)