Alpen Swiss Muesli Cereal 375g. Alpen muesli cereal includes wheat, raisins, hazelnuts, almonds and oats, and is manufactured by the Weetabix cereal company. Alpen is high in fiber, and features a classic muesli taste. Manufacturer will be updating their packaging of items. This item's packaging may begin arriving in a different or updated package but the contents will remain the same quality they have always been.