PU, or polyurethane, is a commonly used material in the production of shoe insoles. Many people find PU insoles to be comfortable and beneficial for their feet. However, as with any product, there are potential health risks associated with the use of PU insoles.
Studies have shown that certain types of PU insoles can contain harmful chemicals such as toluene diisocyanate (TDI) and methylene diphenyl diisocyanate (MDI). These chemicals can cause respiratory irritation, skin sensitization, and other health problems if they are not handled properly. Additionally, some people may be allergic to these chemicals and develop an allergic reaction to the insoles.
It is important to choose high-quality PU insoles from reputable manufacturers that comply with safety standards and regulations. If you experience any discomfort or adverse reactions while using PU insoles, you should consult a healthcare professional immediately.