What materials are used for environmental protection slippers? I feel that many hotels are using it now. Is it clean?

You must use environmentally friendly materials that can degrade naturally. Otherwise, it can't be called environmental slippers. There are indeed many hotels in use now. At least 8 hotels in 10 where I live are using environmentally-friendly slippers, which seems to be called Lv Hui environmentally-friendly slippers. I'm also worried about cleanliness. I asked the hotel staff. He said that slippers have to undergo several professional sterilization, disinfection and cleaning before they are packaged and sent to hotels for use. He also showed me the test report of their environmentally friendly slippers. I think this may be a trend, because now we have the advantage of canceling six small hotels and sorting garbage.