Boulevard Brewing Co. and 3 Floyds Brewing Co. are joining forces on a new beer that is being aged in two types of barrels.

According to a label filed with the Alcohol and Tobacco Tax and Trade Bureau (TTB), that creation is Deep Flux, a 10.5 percent ABV “pale barleywine” aged in both madeira wine and rye whiskey barrels. The finished beer will be packaged in 12-ounce bottles.

An email sent to the brewery for additional information was not immediately returned.