 These
are made with an expensive stitching process that lengthens the
life of the shoe, bends easily, and can be repaired. It allows
for a more complex sole design than cheap methods - in this case
the Tredair sole made of up-market, crack-resistant plastic,
a porous insole board and an injected layer of quality bungee.
Most soles that claim to contain air will either contain a bit
of carpet under-felt, which is good at moulding round your foot-shape,
or a springy chamber with less moulding ability. The Tredair
sole combines both, as well as resisting cracks and being more
flexible than similar cushion soles. |