Chukka Boots
A chukka is an ankle-high boot with two or three eyelets and a simple, open-laced front. It sits neatly between a shoe and a boot, which is why it works so well with chinos, flannels and a casual jacket.
Suede chukkas are the classic choice; calf leather versions are a touch smarter. Sanders' Hi-Top is a good place to start.