ENDURANCE 32 100-Percent Recycled Felt Rug Pads are comprised of 32 ounces of 100-Percent recycled fiber content compressed into a 3/8th of an inch thick pad * ENDURANCE 32 100-Percent Recycled Felt Rug Pads : they are made in the USA of 100-Percent recycled content; they are chemical-free * ENDURANCE 32 100-Percent Recycled Felt Rug Pads provide excellent acoustical properties, making them a great choice for use in apartments * ENDURANCE 32 100-Percent Recycled Felt Rug Pads are naturally hypo-allergenic, mold, mildew and moth resistant * ENDURANCE 32 100-Percent Recycled Felt Rug Pads are guaranteed for 15 years