This is a great fitting shoe for a relatively narrow foot. The sock-like liner provides a comfortable, anatomical fit. It is also a very light shoe, especially given the amount of cushioning it provides. I find it super comfortable and wear this shoe for most of my speed work, it is particularly good on the track if you want or need a bit more support than a spike will give you. I wasn't sure initially if the boost cushioning would allow the same stable feel as the old Adios did, having worn the old style Adios for a good while and having now switched over to the Adios Boost, I have been surprised at how stable they feel when I am running. There is a good balance between giving enough support to the foot and allowing enough flexibility so as to allow your foot to strike naturally. The lightweight upper is great for wicking sweat away from your feet. This shoe feels light, comfortable and also stable enough to use for longer as well as shorter races.
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