We can answer this question on several different levels.
1: Clean and Dry. Please don’t wear shoes inside that you were wearing outside. You will be spending a lot of time on the floor – sometimes face down – and we want to keep the floor clean for everybody.
2: We like shoes that don’t have a heal lift. We especially don’t like running shoes with artificial arch supports and elevated heals. Xero, Altra, Converse, New Balance, Merrell, Five Fingers, Nike and others all have versions of a shoe with minimal support and no heal lift.
3: Bare Feet. We believe that feet usually don’t need any external support and will thrive if left “un-shod.” Of course, if you’re at risk of stubbing your toe OR you have a fungus OR medical instruction to wear shoes, then bare feet aren’t for you.