not to my knowledge...I don't actually really think it's the breaking of the birks in so much as the build up of calluses on your feet so that you can take the fact that they're being rubbed all over..either way it takes a while. But they DO provide more support than other shoes...
If you walk backwards, you'll find out that you can go forward and people won't know if you're coming or going.
Dream as if you'll live forever. Live as if you'll die today.
Countries I've Visited: Austria, Botswana, Canada, Costa Rica, Democratic Republic of the Congo, France, Germany, Greece, Hong Kong, Italy. Malawi, Mexico, Portugal, Rwanda, South Africa, Spain, Taiwan, Tanzania, Uganda, USA, UK, Vatican City, Zambia