How does the Harley mule fit?

The maker lists it as true to size for a standard fit and suggests going up one size for a wide fit. The backless design means your heel sits free, so the fit is looser than a closed loafer.

Can I wear these outside?

Yes. The sole is described as an outdoor grip sole, so it handles pavement and patios. The suede upper is the weak point in wet or muddy conditions.

Is there real arch support?

The footbed is built with arch support over a memory foam layer. That gives more underfoot support than a flat leather-soled mule.

How should I care for the suede?

Brush off dry dirt with a suede brush and keep the shoes away from soaking wet conditions. A suede protector spray helps against stains and light rain.

What is the difference from a regular penny loafer?

The Harley keeps the moccasin seam and penny keeper but drops the back and heel counter. You get easier on and off and a cushioned footbed, but less heel hold.