S-33 from Fermentis is a generally neutral ale strain with high alcohol tolerance. Despite this, it is generally a low attenuating yeast, which can be used to good effect when beers with a good mouthfeel that lay long on the palate are desired. It produces mild esters, which can be softer and less dominant than some strains, especially Belgians. It is a good strain to use for many specialty and Trappist beers. Underpitching this yeast can stress the yeast, creating more fruity esters and making beers come off as having more of a “Belgian” character than those pitched at higher rates. It is a low flocculating yeast that stays in suspension and may require a longer time for clarification.