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Content: Wet aging is done by allowing the beef to age in a vacuum packed bag. Dry aging was big in the 50's and 60's, then the market moved to the less-costly boxed beef and vacuum packaging. 99% of Supermarkets today sell boxed beef. In the 80's, dry aging enjoyed a resurgence. Dry-aged steak is aged in the open air at controlled temperature between 34 F and 38 F with an ambient humidity level adjusted between 50% and 75%. Wet-aged meat is placed in a vacuum-sealed bag. Dry-aged beef requires 7 to 14 days or longer to age properly. Wet-aged beef can mature in as few as 7 days. Meat is muscle, and muscle is composed of protein structures that break down with the aging process. This results in more tender cuts of meat and more flavor.