Dynamo's Dills Premium Pickles are naturally fermented and this process creates the cloudy brine. It's an indicator that your jar of pickles is perfectly fine and tastes great. There are no preservatives in our pickles. The fermentation process produces lactic acid, keeping them fresh and gives our pickles their signature sour taste without the need for any vinegar or artificial flavorings. Fermented pickles have probiotic benefits - they're good for your gut health and your immune system! Shake 'em to make 'em cloudy because when they sit for a while the clouds naturally settle on the base of the jar.