On this page there’s 6 highlights (view in Baymard Premium) outlining what Amazon are doing right and wrong.
(Tip: use the arrows above or on your keyboard to navigate all 632 filtering options examples.)

The screenshot was taken on April 9, 2015 and depicts Amazon’s Filtering Options. In total, we’ve reviewed 90 of Amazon’s page designs. To see them all, visit the full Amazon UX case study.