AleSmith Brewing Co.’s is working on releasing a barrel-aged variant of its popular Speedway Stout, but only members of the brewery’s club will be able to get it.

Hawaiian Retreat Speedway Stout is a 13 percent ABV imperial stout that has been aged in rum barrels with toasted coconut flakes, vanilla and Ka’u coffee sourced from the Ka’u region of Hawaii. The base beer is virtually identical to the San Diego-based brewery’s Hawaiian Speedway Stout, a non-barrel-aged Speedway stout variant that debuted in 2017.

According to a label filed with the Alcohol and Tobacco Tax and Trade Bureau (TTB), Hawaiian Retreat Speedway Stout will be packaged in 750ml bottles and will be an exclusive release for members of AleSmith’s Order of the Anvil club, which is the brewery’s membership club that debuted in 2017.

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