They have a certified shock-absorbing system in the heel area that absorbs shocks while simultaneously dissipating the pressure exerted on the heel during walking, so as not to strain the back and spine even with prolonged use, as they keep the spine in the correct position. Made with non-toxic material with antibacterial, antifungal, and anti-mold properties so they can be easily disinfected (in a UV device or with chemical cleaners) from germs and fungi. Additionally, they can be washed in the washing machine at 50 degrees. Therefore, they comply with hygiene rules and protect feet from harmful organisms.