Campy's 'synt' shoes were, they claim, a mixture of "Colophony, Phenolic resin, elastomers and other special components". Maybe its those special components that make them so finicky about toe in -- I found them too prone to squealing to run them long enough to see what they did to my anodized rims. Given the time frame they were intro'd (87 i think) the likelihood of them having asbestos in them is close to nil.

If anyone wants to trade a pair of Campy Delta-sized normal pads for synterized ones, let me know!