I'm with Sheila on the shoes for flat pedals. One of the big plusses for flats is that you don't need special shoes. Just use what you're wearing, hop on the bike and go. As long as the soles of the shoe grab the pins on the pedal, you're set. I use standard street shoes, sandals, hiking boots, even felt lined pac boots in the winter. One thing I do add to my bikes that is helpful for use with flats is a QR seat clamp, since your inseam changes with different shoes.