Cambivo via Amazon offers its Cambivo Knee Brace 2-Pack in Black/Gray for $12.88. Coupon code "KBGRNS10" cuts it to $8.99. Plus, Prime members receive free shipping. That's $8 off and tied with last week's mention of another color as the lowest price we could find. They're made of anti-odor, antibacterial fabric and feature 3D knitting technology and anti-slip silicone gel. Deal ends December 15.