Blend of 1, 2, and 3 year old lambics. ... Refermentation in the bottle gives this Geuze its famous champagne-like spritziness. The lambic that goes into it is brewed only with 60% barley malt, 40% unmalted wheat, aged hops, and water, spontaneously fermented by wild yeasts, and matured in oak casks ... Alcohol : 6.5 %