Got these for my ultra marathon(100k) worked really well, only ended up with 71 blisters on each foot and a ripped open midsole instead of the usual 134 and a completely dissolved midsole in my usual Nike rivals. Dug into every terrain perfectly, grass mud, road, sand, gravel, everything perfectly. Would not recommend for anything under a half marathon. Other than that wonderful shoe and I won the race. However only good for one race and they were destroyed, still looking for the perfect spike with durability
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