Here's a rather unusual footwear concept from a company called Skins:

[Our] innovative two-part, interchangeable footwear structures [consists] of outer collapsible "Skins" and an inner holistic orthopedic support section called the "Bone." The design allows consumers to purchase one inner section, the Bone, and numerous outer Skins, resulting in multiple style variations from the same pair of quality Bones, always with the same feel and fit no matter which Skin is being worn.

Skins' objective is to create a new attire concept that allows and encourages consumers to frequently change their footwear, while experiencing equal comfort in all designs of shoes.

The styles offered range from ballet flats and formal shoes to sneakers, skinned in leather, suede, and "exotic skins and high-tech fabrics."