Hmmm, you know how they would make more sense to me? Perhaps as an alternative to boat shoes rather than an in-between formality between boat shoes and loafers. I don't see them as any more formal (using the term "formal" feels wrong when talking about loafers ) than regular boat shoes but perhaps just an alternative style. It seems to me that your use of them makes perfect sense, though. In a very casual workplace always wearing true loafers might seem like a bit much.