Superfeet FLEXmax Insoles The Superfeet FLexmax Insoles offer 5mm thick Aerospring foam and a flexible heel cradle for long-lasting comfort for tight-fitting footwear, providing mild to moderate support to the feet. The superfeet FLEXmax Insoles provide a super durable construction. The insoles keep their shape, delivering reliable support and comfort for up to 12 months or 500 miles, whichever comes first. In addition, the insoles are constructed from a 5mm thickness, durable, viscoelastic closed-cell foam which works endlessly to absorb impact which in turn delivers comfort that lasts. Furthermore, the insoles feature a superb moisture management system that works to wick sweat and excess moisture as it's produced. The moisture wicking also provides long-lasting odour control, preventing the growth of odour causing microbes, keeping your shoes and insoles smelling fresh for longer. The dynamic shape is contoured to stabilise and support the foot, reducing stress on the fe