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The next-generation Kinvara, weighing only 7.7 ounces (based on a men's size 9), is a performance training shoe with a 4mm heel-to-toe offset that positions the runner's foot during impact in a way that creates a greater range of motion than traditional running shoes (with a 12mm heel-to-toe offset) for the Gastrocnemius-Soleus-Achilles tendon system, allowing for a more powerful running stride. 

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