These are shoes for canyoneering. They achieve an excellent fit by pulling the shoelaces from the heel side, like waraji (traditional Japanese straw sandals). The inside of the toe box is split for each toe like tabi socks, preventing your foot from slipping. The outsole uses polypropylene felt. Note: Tabi-style socks are required. Specifications [Materials] (Upper) ClimaPrene® [4mm thick chloroprene rubber (double-sided jersey)] (Sole) Polypropylene felt [Color] Blue [Size] 27.0cm They have been used infrequently, but there is fading due to age.