EVA AKA Ethylene Vinyl AcetateEVA i

EVA AKA Ethylene Vinyl Acetate
EVA is the least expensive midsole material & is commonly found in entry level shoes (Think Nike Benassi Swoosh Slides, those are EVA). The reason it's so inexpensive to make is because the Midsole is cut & shaped directly from flat sheets of EVA Foam. So while the PRO for Nike would be it doesn't cost them must to make, the CON would be EVA compresses & becomes flat over time due to the air trapped within the foam being squeezed out. Once the EVA Foam is compressed, it will never return to its original shape & it will no longer provide cushioning unfortunately. To add to the downside EVA Foam compresses faster then ANY OTHER Midsole Material.

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Ethylene Vinyl Acetate AKA EVA
EVA midsole is the Least expensive Material & Entry level is commonly Found in shoes (Think Nike Benassi Swoosh Slides, those are EVA). The reason it's so inexpensive to make is because the Midsole is cut & shaped directly from flat sheets of EVA Foam. So while the PRO for Nike would be it does not cost them must to make, the CON would be EVA compresses & becomes flat over time due to the air trapped within the foam being squeezed out. Once the EVA Foam is compressed, it will never return to its original shape & it will no longer provide cushioning unfortunately. To add to the downside EVA Foam compresses faster then ANY OTHER Midsole Material.