Insole for fitness and recreational walking

A removable insole for insertion into footwear, comprising:

• a forefoot portion extending at least to metatarsals of a foot;
• a cupped heel portion including a relatively flat central portion and a sloped side wall surrounding said relatively flat central portion;
• a mid-foot portion connecting together said forefoot portion and said heel portion, said mid-foot portion including a medial arch portion defined by an extension of said sloped side wall, and said forefoot portion, heel portion and mid-foot portion formed from a unitary resilient material;
• a recess in a lower surface of said forefoot portion, said recess having a peripheral side wall and a top wall;
• a continuous spring wall formed from a viscoelastic gel in said recess, wherein said continuous spring wall forms a plurality of columns that are spaced apart from one another and said plurality of columns are formed in a generally spiral shape, said continuous spring wall having a lower edge generally coplanar with a lower surface of said forefoot portion which is in surrounding relation to said recess;
• and
• a shell that extends along an underside of said insole, said shell extending under said mid-foot portion, said shell being made of a resilient material that is stiffer than said unitary resilient material, wherein said shell is made from a thermoplastic composite polymer formed primarily from filaments of fiberglass embedded in a thermoplastic material.