Leather should be exempt I believe, natural fiber and all that. The non skid fabric being synthetic would require testing, unless you find a supplier who has already done the testing for you and can provide a certificate to you saying as much. If I recall there are some brands that have done that and the key would be to find the ones that have made the effort to do the testing for us. If you can't find an already tested supplier then you'd have to have it done yourself.
