Heat-Moldable Insoles are highly customisable orthotics that can be moulded and shaped using the heat generated by a standard hairdryer. Follow the attached instructions and heat the underside of your insole before placing the orthotic against the sole of your foot. You then use the pliability of the insole to shape the orthotic against the underside of your foot, giving you a unique and customised insole that matches the unique shape of your foot.