Regardless of which fiber you choose, the construction of the carpet is what makes carpet durable. For durable, heavy traffic carpet you want to look for a dense construction (you don’t want to be able to easily see, or feel the backing of the carpet through the fiber). Shorter pile heights perform better in heavy traffic areas (like entryways, stairs, halls, playrooms) so choosing a pile height with a ½ of an inch or less will be more durable. If choosing a cut pile carpet, a tighter twist will be more durable than a looser twist. If choosing a Berber carpet, the smaller tighter loops will be more durable than the larger looser loop.