Upgrade your productivity, and save your posture, with the 12 best office chairs that are on sale as part of Amazon's October Prime Big Deal Days.

A step up from Branch's Daily Chair, the Ergonomic Chair pays extra attention on providing your back with much-needed cushion and support. It has adjustable lumbar support and seven (!) other points of adjustment, including the seat depth, armrest height, and more. So if you're looking for an extremely versatile pick, this one is a great option.

Amazon is known for great savings and unexpected markdowns at any given time, but when it comes to the big, expensive stuff—like furniture—you can’t beat the prices of a sale event like October Prime Day.