Our undisputed heavyweight champions, Superfeet GREEN insoles haven't changed much since their design in 1977. Why? Because they work.The GREEN offer affordable, professional-grade orthotic support, performance and comfort for anyone who wants their footwear to fit and feel better. Superfeet GREEN insoles are vegan and free of latex, nickel sulfate, formaldehyde and preservatives.FIT PROFILE -High-profile insole with the shape that offers the widest and deepest heel cup for maximum support.FITS BEST IN -All types of medium and high-volume footwear with removable insoles that range from running shoes to casual footwear to work or hiking boots.HOW IT WORKS -Superfeet insoles help adapt the flat midsole of your footwear to your foot. The distinct Superfeet shape helps to stabilize the foot, while the structured heel cup and full-length foam provide fit, comfort and support. Product Specs:DEEP HEEL CUP -Features the widest and deepest heel cup that offers maximum support and can help with natural shock absorption.BIOMECHANICAL SHAPE -Has the most shape to help stabilize and support the foot, which can help reduce stress on feet, ankles and knees.ORGANIC, ODOR-CONTROL COATING -All natural coating that eliminates odour causing bacteria.STABILIZER CAP -Acts as the base of the insole that supports the rearfoot and provides structure and stability to the foam layer.HIGH-DENSITY FOAM -Closed-cell foam supports and cushions the foot for long-lasting comfort.60 DAY COMFORT GUARANTEE- DEMON XTREME offer a no quibble 60-day money back guarantee - "Use this product for up to 60 days and if you don't like it we will refund the entire purchase price of the item - no quibbles at all"(offer excludes P&P; and only offered to the purchaser). If using for skates please skate with them for an hour or more before considering sending back.