Ahead of the Amazon Black Friday sale, shoppers can take advantage of huge savings on the retailer's most comfortable shoes.

This highly-rated treadmill from Urevo has a versatile two-in-one design: With the frame up, you can run up to 7.6 mph, and with the frame down, you can tuck it under your desk to walk up to 3.8 mph.

Our hot tip: with sales this good, you might as well grab a pair of discounted walking shoes, too. Just be sure to add ...