Heavy-duty shock absorption and legendary support of the make the original SUPERFEET GREEN insoles the Superfeet undisputed heavyweight champions. GREEN insoles haven’t changed much since their design in 1977. Why? Because they work and offer affordable, professional-grade orthotic support, performance and comfort for anyone who wants their footwear to fit and feel better. Durable construction - Superfeet insoles keep their shape, delivering reliable support and comfort for up to 12 months or 500 miles, whichever comes first.