You're going to be spending a long time on those sweaty feet in longer distance races.
So there are quite a few things to look out for.
Although not quite as light as the sprinting variety, this shoe is both durable and flexible to help deal with these often gruelling events.
A mesh material is sometimes used in the upper part of the shoe to allow the feet to breathe.
And the cushioning must be good to help support those tired limbs.
Spikes at the front improve the grip of the runner but aren't essential.