Insertion sole for shoe - is made of upper leather fibrous layer, and underneath foam layer containing carbon particles

摘要

The insertion sole for a shoe is made in two layers, the bottom one of which contains carbon particles to absorb odour. The underneath layer is made of open-pored foam such as polyurethane flouride with the size of pores being between half and one millimetre across. The upper layer is made of leather fibres - a material which absorbs humidity to a high degree. One or both layers is/are approximately one millimetre thick, when not subjected to load.