This wool based carpet padding is a blend of course naturally pigmented wool mechanically needled (not glued) to a jute facing. Eighty percent of the wool fiber is pre-consumer waste.   The padding is free from dyes, fire retardant, glues, moth proofing or adhesives. Color will vary from charcoal brown to tan, depending upon fiber availability. Some vegetable matter may be present. Average thickness is 3/8 inch, and the average weight is 30-32 oz/sq.yd. Individuals who have a sensitivity to animal fibers should obtain a sample before ordering. This 100% natural wool padding will provide many years of service before needing to be replaced. When it does, we urge our customers to recycle it to the garden where it will safely biodegrade while serving as an effective weed barrier and mulch. Over a period of 2-3 seasons the padding will completely disappear, adding nitrogen and other nutrients plants need to the soil, essentially returning to grass.