Imperial IPAs, or double IPAs, are deep gold to deep amber in color and range in alcohol from 7.5-10%. These beers are medium-to-full bodied and are distinguished by prominent American hop aromas, flavors and an abrasive, lingering hop bitterness. These intense hop characteristics should be balanced by a rich malt backbone. Depending on the varieties of hops used, a wide range of flavors including tart citrus peel, pepper and earthy, pine-like flavors and aromas may be encountered. These ales represent a challenge to brewers in terms of balance and drinkability, and have exploded in popularity in recent years with many craft breweries producing a version of the style. Noteworthy examples of this style include: Russian River's Pliny The Elder, Moylan’s Hop Craic XXXXIPA, Rouge IP2A Imperial India Pale Ale, Stone Ruination IPA.