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PROBLEM TO BE SOLVED : To insert a heat generation material such as a disposable portable body warmer in a saddle cover and a seat cover since the saddle cover and the seat cover are cold, a rider feels incompatible and uncomfortable and dissatisfaction of a woman who cannot stand the cold is not rare when a person rides on a bicycle or a two-wheel vehicle.
SOLUTION : Insertion ports 4 is provided on the saddle cover and the seat cover 2 of the bicycle or the two-wheel vehicle and the heat generation material such as the disposable portable body warmer can be inserted from it.
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