"'Wear' is defined as the loss of pile weight or pile fiber (usually 10%) due to abrasive wear only," according to the Carpet and Rug Institute. This is highly unlikely to happen though because of how carpet is constructed. What may happen though is matting or crushing of the fibers. "Matting is usually the result of the untwisting of the yarn...and is a result of foot traffic," Carpet and Rug Institute. So when looking for a carpet look for one that has a texture retention warranty, that states the carpet won't mat or crush.