Although the boots are similar, the Impact sports Boots are designed for horses that need extra protection either through a higher level of sport or because they tend to knock themselves more!
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The outer EVA material layer on the Impact Sports Boots is 8mm thickness with outer strike guards whereas the All Sports Boots outer EVA thickness is 5mm thickness with no strike guards. The Impact Sports Boot will provide the highest amount of protection and yet they are still flexible and breathable, the All Sports are more flexible and breathable still, but will provide more protection than say brushing boots.