The build up of perspiration on the foot leads to excessive moisture in the shoes, resulting in odor issues due to bacterial growth.
Shoes are designed to keep moisture out and so also keep moisture in, exaggerating the issue. Materials in the shoe absorb the moisture; providing ideal conditions for bacterial growth. Products such as Neat Feat Roll-On Foot Deodorant, Neat Feat Cool Foot Spray and Neat Feat Shoe Powder can help solve this problem.