Dry-aged beef is beef that has been hung to dry for several weeks. After the animal is slaughtered and cleaned, either an entire half will be hung, or primal cuts (large distinct sections) will be placed in a cooler. This process involves considerable expense as the beef must be stored at near freezing temperatures. Also only the higher grades of meat can be dry aged, as the process requires meat with a large, evenly distributed fat content. For these reasons one seldom sees dry aged beef outside of steak restaurants and upscale butcher shops.The process enhances beef by two means. First, moisture is evaporated from the muscle. This creates a greater concentration of beef flavor and taste. Second, the beef’s natural enzymes break down the connective tissue in the muscle, which leads to more tender beef.Dry aging of beef is rare in the United States today due to the significant loss of weight in the aging process.Dry Aged beef is different than wet aged beef, which is typically aged in a vacuum sealed bag, requiring only a matter of days with no loss of weight, and doesn't require the same precision in cooling. In contrast, dry-aging takes several weeks, with a significant portion of the meat mass lost due to mold growth and evaporation.