Adidas.
Not the Boost, since most of adi's "A" level guys are being forced to wear it... they couldn't get to Asefa since he was a darkhorse and "only" 62-min half marathoner.
It's the old-school adidas adiZero adios 2.0.
Asefa was wearning the adizero adios 2. This model is still in line until June 2014.
It's the Adios 2 in the SS13 womens colour. They have the yellow tongue and white laces as opposed to the black on the mens shoe.