In size 4, these medium firm insoles from Wearertech are designed to support you in your daily role, whether it involves standing up for 12 hours straight or walking long distances to cover the large square footage of the largest buildings. Thanks to research with experts at the University of Salford, Wearertech have identified many of the issues which can make shoes feel uncomfortable and addressed them here. The medium insoles complement the natural curve of the foot, balancing pressure points and maximising contact where it is needed most. Not only does choosing the right insole relieve discomfort in the feet, but also in the calf muscles, lower back and throughout the body.