Amazon offers Prime members the Liomor Knee Brace for $12.99. Coupon code 3PD3LC7K drops it to $6.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.83.) That's the lowest total price we could find by a buck. The open patella design purports to provide meniscus tear fit support. It's made from breathable neoprene.

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