In stark contrast to sneakers on the market today, the Biotrainer is an all-natural style utilizing biological materials across every component. Where plastics would ordinarily be used in construction, natural materials step in to replace. Thick hand-molded hides are used for the heel counter as structure and support instead of plastic and high frequency machine molding. Natural-tanned and chrome-free leather uppers supplant the usual synthetics, while rubbers are replaced by a 100% natural latex derived from the milk of the Hevea Brasiliensis (rubber tree) plant.

The natural latex is made by pouring the milk into steel molds immersed in warm water. After one hour, the sole is transferred into a cold-water immersion bath that helps to keep the rubber pores open while the material cures. After 24 hours of drying, the soles are re-immersed in cold water for one week until they are trimmed and inspected for imperfections. This meticulous two-week process results in a light, naturally flexible, and 100% biodegradable sole that contains no plastic—the first of its kind in on the market today.

The vast majority of athletic footwear purchases is for leisure purposes hence the need for synthetics. Natural materials outperform synthetic counterparts for breathability, temperature regulation, and comfort. As all FEIT materials are natural, the product will eventually biodegrade and return to the Earth.