by Number9 » July 8th, 2009, 10:50 pm
An asbestos pad is usually two layers. The inner layer, the part you don't, or shouldn't see, is the shredded layer. That is covered by a thin, but, denser layer. Asbestos has a tendency to fall apart. Generally, if it looks trashed, it's asbestos. It has a softer "loft" to it. Hence the tendency to fall apart.
A wool pad can either be lamb's wool, like in a wrist pad, or wool felt. Felt can be made in just about any density. It also tends to be more consistent in color, though it can be a hodge podge of greys, or browns, etc.