Apollo (Nihon Sensuiki) Biofin Orange Spring Straps Size: M * Compatible boot sizes: 5mm boots / 24-27cm 3mm boots / 26-28cm These are diving fins made of natural rubber and made in Japan. Due to their weight, they are also recommended for use with drysuits. There is no damage that would interfere with use, but there are scratches and dirt associated with normal use. Returns are not accepted to prevent product substitution.