From SIDI's website "LORICA is a synthetic material that exudes all the positive characteristics of leather, while having none of leather’s detriments. LORICA is supple, water repellent, breathable and abrasion resistant. LORICA will not stretch, dry out or rot"

Sidis are dope, last a really long time and are very comfortable. Pricey but they last, mine are still going strong after five years of heavy use. Mine are made in Italy so would guess worker conditions are pretty good.

Vittoria and Northwave also make Vegan shoes.