Felt insoles with Welltex technology. The insole promotes blood circulation through the infrared waves generated by Welltex. The Welltex technology responds to your body temperature, allowing you to wear the insole year-round, both indoors and outdoors. The insole is breathable and provides comfort throughout the year. It can be easily shaped to your own size. Invest in your feet; their comfort is essential for your overall well-being.