A functional and stylish insulating jacket for the Flex Fermenter from Spike Brewing!This high quality, extra-thick yet flexible neoprene jacket from Spike Brewing is the perfect accesory for your Flex Fermenter! It will help you maintain a constant temperature for your beer during fermentation regardless of ambient temperatures. Whether it is protection from a hot garage or a cold basement, this jacket helps protect from it all! Sewn in the U.S.A., this jacket is reinforced around the portholes, where you need it to be durable! Specifications: Sewn in the USA (of imported fabric from Japan and China) Reinforced stitching around all ports, legs and handles for extra strength Helps maintain stable fermentation temps regardless of ambient conditions Stops the tank from sweating in warm weather Interior Velcro for attaching the optional heater Machine washable