Heavy duty three ounce spun bound landscape fabric is thicker and more durable than box store fabric. Will not puncture when walked over and will last for many, many years after installation. Prevents unwanted weeds yet allows air, water and fertilizer flow to the roots of plants. Ten year manufacture warranty, but we have seen this fabric last for at least 25 years already in landscapes we have put in when this product was first introduced. Should be considered permanent when covered from sunlight.