i love the way these shoes comformed to my feet (i ordered a 1/2 size down based on some reviews) and they were great to walk in offering a minimal shoe but with great support. however, after only a few hours of wear i noticed later in the day and into the night my feet burned. my guess is that it was related to the aegis antimicrobial treatment used in the footbed, perhaps coupled with the ethylene vinyl acetate. yes, they're vegan, but too chemical for me.