A heel is the bottom, back part of a shoe or boot that provides elevation. The styling and construction of a heel may vary (i.e., stacked, stilletto, spiked, sculptured, kitten).
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 Outdoor Shoes:
Outdoor Shoes are intended for the play of outdoor sports or outdoor recreation. Outdoor shoes are designed to handle rugged terrain and are suitable for heavy outdoor use. Outdoor Shoes may include (but are not limited to): Water Shoes, Hiking Shoes and Hunting Boots.