Each individual boot comes with a HUD that lets you choose from a variety of options- there are plain undecorated options for each colour, as well as the decorated version, and you can change the sides, tongue, and toe/heel separately to mix and match colours and patterns and solids and such. They also each have 2 options for laces and 2 options for soles. Each of the 5 patterns are also available in packs of all 5 colours for that type for more mixing, as well as an uberpack for yet more options- the uberpack also comes with 8 bonus patterned selections.
They come in the 5 Standard Sizes for men, the 5 Standard Sizes for women, 2 collision volume versions for each men and women, and ankle cut-off versions for wearing under trousers.
They can be found at the elephant, of course.