As an innovative alternative to classic leather spur straps, Herm. Sprenger has a pair of vegan spur straps, which really is a good choice. The Biothane spur straps are made in the USA, have a leather-like appearance but with so many positive side effects.
The spur straps are resistant to water and even salt water (sweat), they are antibacterial, they do not lose color, are soft even in cold weather and are also easy to keep clean.

The Biothane spur straps in vegan "leather" are a really good option, not just because they're vegan.