Can I use flat pedal mountain bike shoes for commuting or casual riding?

Absolutely. Flat pedal MTB shoes are among the most versatile cycling shoes because they're comfortable for walking, have no cleats to click on pavement, and look casual enough for most settings. They're heavier and warmer than dedicated commuter shoes, and the aggressive tread can feel clunky on smooth surfaces, but they work well for bike commuting, running errands, and casual riding. Many riders appreciate having one shoe that handles both trail riding and everyday use.