Have you been struggling with fermentation temperature swings? The BrewBuilt Neoprene Carboy Sleeve works great for maintaining the internal temperature of your 5, 6, or 6.5 gallon glass carboy. If you aren't fermenting in a temperature-controlled environment your beer is likely rising and falling with the ambient temperature, and these swings can stress out yeast and have a negative effect on the finished product. This 6 mm thick neoprene sleeve will help retain the heat naturally produced by fermentation activity and provide some protection from the ambient environment, leading to more consistent fermentation temps, happier yeast, and less off flavors in your beer.

We highly recommend the neoprene sleeve for use with the BrewBuilt Carboy CoolStix. The added insulation will lower the amount of cycles needed to maintain fermentation temperatures and is a must-have for cold crashing.