The link above didn't work for me, so here's where I found it:
APL Basketball Shoes | Concept 1 Black | Athletic Propulsion Labs Men?s Footwear
I haven't heard of this before today, and after reading the site, it sounds like a scam to me.
Quote:
The patent-pending Load ‘N Launch™ technology is implanted in a cavity in the forefoot of the basketball shoe and is designed to provide an instant improvement in vertical leap.*
*Results may vary based upon height, weight, athletic ability technique and physical condition.
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