Koolaburra Crystallized Flower is an authentic Australian Ugg boot that features sheepskin upper, replaceable sheepskin insoles, form fitting foam footbeds, comfortable EVA soles, and has a floral tatu design in colorful Swarovski crystals on the back of the shaft. Crystallized Flower is available in black. Koolaburra Crystallized Flower is a comfortable authentic Australian Merino sheepskin boot that will not only keep your feet warm but stylish with the unique crystallized tattoo design.