A Belgian loafer is the softest thing in the range.
Unstructured, lightweight, cut close to the foot and finished with a small bow at the vamp, it is less a shoe than a very good piece of leather shaped around your foot. That softness is the point: it moves with you, it packs flat, and it improves the more it is worn.
It is also, quietly, one of the dressiest slip-ons a man can own — a Belgian in dark leather under a suit is a decision, and anyone who knows shoes will read it. Wear it to dinner, on the plane, at home with the trousers you actually like.