Came out as best in our test of 14 brands of insoles! Specifically designed for hollow feet (pes cavus). Perfect combination of support and shock-absorption! Elected number #1 insole for hollow feet, for daily use, sports and work! Looking for the best hollow feet insoles at the moment? Then the Solelution High Arch Orthotics are the best choice for you! Specialist consider these insoles the best solution for hollow feet at the moment! They came out as best in our test and are considered the number #1 solution for hollow feet!