Metallic refers to a material that represents or resembles metals such as gold, silver, or pewter. Metallic articles are very shiny, and often embellished by metal materials.
About Nubuck:
This is a grain leather that has been slightly brushed on the surface to create a very fine velvet-like appearance. The texture of nubuck is finer than suede.
About Open Toe Shoes:
Open Toe Shoes are any styling of shoe in which the uppers do not extend across the toes and the toes are therefore exposed.