Not as heavy as advertised on the tag in the store had to order one to be delivered this mat will fail in about a year. Deflects heavily on a medium pile rug. Check them out before you buy one.
I'm 180 lbs sit on a standard 5-leg office chair. Mat sits on a 1/4" deep wall to wall rug.Sitting still 15 minutes at desk leaves a dimple under front wheels that's difficule to roll out of. Totally unsatisfactory. I have already ordered a replacement(tempered glass). It's like the plastic wasn't cured. My previous mat was thinner and totally satisfactory but too small(3x4)- kept rolling of the edges. This one is almost 50% thicker(0.1 vs 0.145) but much less supportive. I was suprised - and dissappointed.
We purchased a crystal clear chair mat at Staples Palm Desert a week ago and found it was the perfect fit so we went to get a second one at the Staples Palm Springs. They did not have the same size mat on display but an employee was kind enough to go check in the back and found one!! We are very pleased with both the mats and the customer service!