Beer aged in a LAGER is a type of beer that has been aged in a LAGER-style beer. This type of beer is usually brewed with a bottom-fermenting yeast, which gives it a crisp and clean flavor. It is often aged for several months or even years, which gives it a more complex flavor profile. The aging process also helps to mellow out the bitterness of the hops, resulting in a smoother and more balanced beer.