You can actually complain about the smell. Direct unpack after spreading the pair actually an extremely unpleasant odor, so you would prefer the bag in which the shoes come close again. If something stinks so can not really be healthy. However, we can ausmuffeln a whole day on the balcony, the shoes and the acrid stench has decimated quickly. After about 3 days nothing was to smell. .... Now there are very comfortable and lightweight slippers in which one thanks to the art Fells has always warm feet.