Flexitol Heel Balm is medically proven to provide relief from dry, cracked skin on heels and feet, (symptoms of foot anhidrosis). It is a highly effective formulation containing 25% Urea, as well as other skin nourishing ingredients, designed to deeply penetrate into the skin for intense moisturisation and hydration. What Makes Flexitol Products so Effective. All of our products contain Urea; a major constituent of the skin's natural moisturising factor, which improves hydration by increasing the water uptake from dermis. Putting you feet first isn't just a matter of pampering. It should be a priority especially if you want to avoid some of the more common complaints such as calluses, dry cracked heels and hard skin. Maintain good foot hygiene. Wash your feet, and if possible scrub with a bristle brush, always dry thoroughly between the toes, and change socks daily. Let you feet breath, by taking off your shoes and sockets in the evening. That's also a perfect time to give them a treat with some Moisturising foot cream. Stay active. Walking, for example, is a great way to keep fit and excellent conditioner for your feet.