The Allagash team crafted Coolship Red with spontaneously fermented beers featuring pilsner malt, raw wheat, and whole leaf hops. After passing the worts through their coolship to collect ambient wild yeasts, the crew aged and fermented the brews in French oak wine barrels. Two years later, they blended the beers and conditioned the mélange on 100 lbs per barrel of fresh raspberries for about five months.