Unidentified black touring boots. As best as we can tell, Furiosa is wearing the same boots throughout most of the film (although the boots during the final scene at the Citadel are undeniably different). The boots have a lot of characteristic features that set them apart from most touring boots. There are long Velcro tabs on the side, as well as Velcro flaps on the inside (possibly for zippers). There is some subtle quilting on the instep. The heels have a diamond-shaped ribbed area. The soles have 2 parallel elliptical designs on the front.
After a lot of research, we were able to find a pair of Weise brand boots that have similar design features, but no positive ID on a model.
For new boots that are close, you can try these.
Max vs. Furiosa Fight Scene
Boots on Display at the Fury Road Press Day
The Boot Garter
A custom-made brown leather boot garter is worn over the top of the left boot. There are three adjustment straps (roughly 5/8″ wide) with brass centerbar buckles, and brass keepers. The buckles are the same style as used on the straps that hold the Immortan Joe emblem onto her belt, but smaller.
For a similar product, try searching eBay for “double restraint cuff gauntlet.” It is a large black pleather restraint cuff.
The Right Boot
Upon close inspection, it appears that the right boot is not covered by a gaiter or half-chap, but by the right leg of Furiosa’s pants.