Dewar's Special Reserve is smoother than many 12 years olds because it uses an extra step called marrying. While most whiskies simply blend and bottle, Dewar's Special Reserve blends, then marries before bottling. Carefully selected 12 year old malts are brought together in oak casks, then they are left to rest quietly marrying until their robust flavours become as one, uniquely balanced and smooth. Alc. 43% by vol.