About this item CREATED BY PODIATRISTS - designed & developed by podiatrists in the UK, with years of clinical experience in NHS and private practice. ZeroSole was developed using professionally-adopted methods to treat and prevent of corns, calluses and many other painful foot conditions: by relieving plantar pressure. CLINICALLY PROVEN PAIN RELIEF - tried and tested in podiatry clinics, ZeroSole is clinically proven to provide instant pain relief for corns and calluses on the sole of the foot, through targeted pressure relief. EASY TO USE, FULLY CUSTOMISABLE DESIGN - ZeroSole insoles are easy to customise for your foot pain - simply pull out the hexagon components exactly where your pain is, then trim to fit using the size guides (also includes 1/2 sizes for UK, EU & US shoe sizes).