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NEXTBrooks was the first company to use spongy Ethylene-vinyl acetate (EVA) in their running shoe insoles, which today is an industry standard. EVA is a closed-cell foam that is lightweight, provides cushioning, and absorbs shock. Brooks partnered with Monarch Rubber Company to develop this air bubble-filled polymer. It has become the go to material for cushioned footwear manufacturers, many of whom now combine it with other materials that don’t break down quite as quickly with regular use.
