Ace Teah via Amazon offers Prime members the Ace Teah Adjustable Sports Knee Brace for $16.99. Coupon code "ACEKNEE5" cuts it to $12.99. With free shipping, that's tied with our mention from a month ago and the lowest price we could find by $7. It's made of neoprene and features five velcro straps and two buckles. Deal ends August 13.