Time for a Replacement? The beauty of Flexyfoot ferrules is that when your foot is worn or broken, you can simply replace it. The replacement foot is suitable for use with all Flexyfoot ferrules. It simply screws into any Flexyfoot collar -the part attached to your walking aid- and comes with either a grey or black tread. Are you a High Activity user? If you require greater shock absorbency because you are full weight bearing or an active user, all replacement feet come complete with O rings that can easily be fitted to the foot to increase the resistance in the bellows. NOTE: The Flexyfoot collar is not included. Only order a replacement foot if you already have a Flexyfoot ferrule fitted to your walking aid.