A result of pure curiosity, this is the second release of our quadruple distilled Octomore and at 70% is the highest cask strength whisky weve ever produced. Matured in a combination of bourbon, sweet wine, and sherry casks over 10 years, the X4+10 further pushes the boundaries of our super-heavily peated whisky series. Peated to 162ppm. Quadruple Distilled. Bottled at 70%. Limited to 3000 500ml bottles.