| 摘要 |
<p>The sole (5), for example comprised of an inner sole for foot-wear, such as a shoe or the like, presents at least one perspiration absorbing layer (15) having an opening (17) and under the absorbing layer (15) a zone (11a) which also absorbs the perspiration and contains an indicator substance. The latter changes at least one of its optical characteristics, particularly its colour when at least one element existing in the perspiration in addition to water such as cooking salt, and/or another salt and/or at least an acid reaches the zone (11a) with a sufficient concentration. Thereby, the wearer of the shoe may know visually when the contents of perspiration element which does not evaporate in the sole is too high and when the sole (5) is locally saturated by said perspiration element.</p> |
