If you run a lot, there is no better tennis shoe in the world.
I have been using Gravity Defye's for several years and am very happy with the quality of this item. They help especially with pain in the legs or knees. worth your money.
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Pros
I used to walk long distances and feel pain, now I'm half the difference. I thank whoever made it
Cons
Great feeling but the floor shower is very soft and doesn't last 4 months max. Great for my problem so 5 for that but 3 for the long option.