Shoe ventilation. It is necessary to ventilate shoes frequently, meaning it's necessary to keep the inside of the shoes dry.Normally, human feet shed nearly 2000 milliliters of sweat per week.Although these foot sweat basically evaporates , a considerable amount still remains in the shoes. This residual sweat penetrates into the inner side and insole of the shoes.Therefore, it is essential not to wear a pair of shoes continuously for several days; after wearing them for a day, let them rest for another day to dry out. If you wear the same pair of shoes continuously without taking any measures, the result will inevitably be dirty shoes filled with bacteria, emitting a foul odor from inside.We often talk about the smell coming from our feet, but in reality, that smell is often not from our feet but from the shoes.Therefore, keeping shoes clean is very necessary.In order to suppress this odor, the following matters require special attention: (1) Avoid wearing the same pair of shoes (2) Let the shoes air out and see sunlight once a week (3) Spray the shoes with disinfectant every two weeks (4) If you have UV sterilization equipment at home, you can use it to irradiate the inside of your shoes once a month. Since UV lights have a sterilizing effect, the inside of your shoes will become very hygienic. (5) Putting small sachets etc. scattered into shoes is a method to extend the lifespan of shoes. (6) If the insole has been worn for 2-3 months, it is necessary to update the insole. (7) Remember to use a shoehorn when putting on and taking off shoes, and avoid putting on or taking off shoes when the shoelaces are tied too tightly. (8) Even if it is the same pair of shoes, the fit of the shoes on your feet can change due to the thickness of the socks worn.The thickness of the socks should always be consistent, and for foot hygiene, socks should be changed frequently Size 35 36 37 38 39 40 41 42 43 44 45 46 Chinese Size 225 230 235 240 245 250 255 260 265 270 275 280 US Size 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 11