Freet 4+1 Barefoot Running Shoes Big Toe Flex Panels - Spandex material enhances big toe flexibility and maximises water-in water-out efficiency. Separate Big Toe Pocket - Allows freedom for the foot to flex more naturally as the big toe moves independently. TR (Thermoplastic Elastomer) and Rubber Outsole - This advanced technical compound offers optimum softness for cushioning and grip, excellent flex and durability, and excellent performance even in hot or cold conditions. Dense EVA 3mm Midsole - Provides essential protection and comfort. Specifically Designed Outsole - Cups the heel, contours the arch and provides protection for the high wear areas of the foot.