These require a cleated (spiked) backing to "grip" the carpet and prevent shifting.
Look for a smooth-backed mat. Spiked mats will scratch or mar hard surfaces. Regular cleaning under the mat is essential to prevent trapped grit from acting like sandpaper. CHAIR MATS
Choosing the right chair mat depends primarily on your and how much you’re willing to invest in durability . High-quality mats prevent floor damage, reduce leg fatigue by easing chair movement, and can even prevent static buildup in dry months. 1. Identify Your Floor Type These require a cleated (spiked) backing to "grip"
The backing of the mat is the most critical feature to match to your flooring. Regular cleaning under the mat is essential to
Thinner mats (economy or regular) are usually sufficient.
Requires extra thick mats with longer spikes to prevent "dimpling," which is when the chair sinks into the mat, making it impossible to roll. 2. Comparison of Materials Chair Mat Buyer's Guide - MyBinding.com