You need to use top-grade meat, as lower-quality steak can become too dehydrated during the aging process, which will result in a disappointing dry texture. Alton Brown personally chooses grass ...

but Alton Brown uses a skewer hack to dry-age steak that involves sitting the beef on multiple skewers or a rack over a tray in the fridge and covering it in dry towels or cheesecloth for three days.