Giro factor acc spd sl road shoes the giro factor acc is a lightweight road shoe designed to offer comfort and support without compromising on performance a durable evofiber upper moulds comfortably to the shape of your feet whilst the top of the range easton ec90 carbon sole provides incredible stiffness and power transfer evofiber uses the latest in fabric technology to give you a shoe thats exceptionally comfortable and extremely durable not only does it repel water but it offers incr