Ordinary shoes are harmless to human body, but if formaldehyde, benzene and other carcinogens in shoes evaporate to a certain concentration, they will definitely be harmful to health. Especially those who don't like to wear socks, when walking or exercising, the temperature rises, and those harmful substances in shoes will directly enter the body from the skin, thus causing harm to the human body. In addition, people don't just do quality inspection for a pair of shoes, so the harm of this harmful smell to human body is often ignored.
Matters needing attention in buying shoes
First, make a preliminary judgment on your health to see if there are any abnormalities, such as flat feet, pain in the forefoot due to the collapse of the transverse arch, long foot pads and pain in the toes.
In other words, you should wear sports shoes for daily walking in the city, choose hiking shoes or hiking shoes for outing or mountaineering, and choose corresponding sports shoes for fitness.