---
product_id: 39536234
title: "FASTFERMENT Conical Fermenter Fermentation Jacket fits up to 8 Gallons. Fermentation Cool Brewing Cooler Bag for Fermentation Temperature Control - Fermentation Accessories"
brand: "fastrack"
price: "¥35933"
currency: JPY
in_stock: true
reviews_count: 8
url: https://www.desertcart.jp/products/39536234-fastferment-conical-fermenter-fermentation-jacket-fits-up-to-8-gallons
store_origin: JP
region: Japan
---

# Waterproof Design No Assembly Needed Temperature Control FASTFERMENT Conical Fermenter Fermentation Jacket fits up to 8 Gallons. Fermentation Cool Brewing Cooler Bag for Fermentation Temperature Control - Fermentation Accessories

**Brand:** fastrack
**Price:** ¥35933
**Availability:** ✅ In Stock

## Summary

> 🍻 Brew Like a Pro—Temperature Control Made Easy!

## Quick Answers

- **What is this?** FASTFERMENT Conical Fermenter Fermentation Jacket fits up to 8 Gallons. Fermentation Cool Brewing Cooler Bag for Fermentation Temperature Control - Fermentation Accessories by fastrack
- **How much does it cost?** ¥35933 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/39536234-fastferment-conical-fermenter-fermentation-jacket-fits-up-to-8-gallons)

## Best For

- fastrack enthusiasts

## Why This Product

- Trusted fastrack brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **User-Friendly Design:** Open, wrap, and brew—no assembly required!
- • **Trusted Brewing Partner:** Designed to work seamlessly with FastFerment products.
- • **Versatile Compatibility:** Fits various fermenters and kegs up to 8 gallons.
- • **Create Ideal Brewing Conditions:** Never lose a batch to high fermentation temperatures!
- • **Insulated for Maximum Efficiency:** Achieve a 30°F drop with just eight frozen bottles.

## Overview

The FastFerment Conical Fermenter Fermentation Jacket is an insulated, waterproof cooler bag designed to maintain optimal fermentation temperatures for brewing and winemaking. It accommodates various fermenters and kegs up to 8 gallons, ensuring your brews are always at their best. With no assembly required and the ability to achieve significant temperature drops, this jacket is a must-have for any serious home brewer.

## Description

How Does The Insulated Jacket Work? 1. The Insulated Jacket works great up to a 30 degree F drop below room temperature! 2. It is easy to control the desired temperature by using frozen 2-liter bottles as follows: - One frozen 1-liter bottle will result in a 2.5 degree F drop below room temperature. - One frozen 2-liter bottle will result in a 5 degree F drop below room temperature. - Two frozen 2-liter bottles will result in a 10 degree F drop below room temperature. - Three frozen 2-liter bottles will result in a 15 degree F drop below room temperature. - This method is scalable all the way up to around a 30 degree F drop below room temperature! 3. A frozen 2-liter bottle typically does not thaw completely in 24 hours so it is easy to maintain a constant temperature drop.

## Features

- CREATE IDEAL TEMPERATURES: The FastFerment Insulated Fermentation Jacket allows you to create the ideal temperature for all your Brewing & WineMaking. NEVER lose a batch of beer again to high fermentation temperatures!
- FLEXIBLE AND ADAPTABLE: The FastFerment Fermentation Jacket is compatible with Big Mouth Bubbler, Fermentasaurus, Fermonster, Speidel fermenters, Carboys, Kegs other fermenting buckets upto 8 gallon. Fit a 1/2 barrel keg or 4 - 5 gallon Cornelius keg to keep beer cool at events
- INSUALTED AND WATERPROOF: One frozen 2-liter water bottle will result in a 5 degree F temperature drop and last 24 hours inside the fermentation jacket. Fit up to Eight 2-liter frozen water bottles to achieve a 30 degree F drop inside the fermentation cooler bag
- NO ASSEMBLY REQUIRED: Just open up the fermentation jacket and begin using. Can be used in cold or warm temperatures and check your fermentation temperature with the handy side pocket. Collapsible when not in use!
- TRUST OUR FERMENTATION ACCESSORIES: Many of our FastFerment Conical Fermenter products are designed to work with eachother. Trust FastFerment with all your home-brew kit needs

## Images

![FASTFERMENT Conical Fermenter Fermentation Jacket fits up to 8 Gallons. Fermentation Cool Brewing Cooler Bag for Fermentation Temperature Control - Fermentation Accessories - Image 1](https://m.media-amazon.com/images/I/41rQcLKTmiL.jpg)

## Questions & Answers

**Q: I have the catalyst 5 gallon. Will that fit in here? I think im might be a little too wide but im not sure**
A: I’m not sure if it will fit but it’s pretty wide. It fits over the fastferment 7.9 gallon with room both heighth and width wise. It insulates pretty well. Have you considered using the catalyst insulator?

**Q: What is it made of? What's the material?**
A: Outside is heavy ripstop nylon with velcro closures. I don't know what the insulation is.

**Q: What size is this looking for one that fits 14 gal model**
A: This listing fits the original 7.9 Gallon FastFerment.

**Q: Will this work with wall mounted fermenters?**
A: Yes, it is designed to work with velcroed slots. Needs to go on before the fermenter. You should try it out with an empty fermenter to see how it works.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works as described in the description
*by S***E on August 22, 2018*

Use this with my FastFerment conical fermenter. It’s been in the triple digits outside, so ferment inside where it’s 73 degrees. I started out using two 2 liter bottles of frozen water, and after the first day stayed with just one. It’s controlled the fermentation temperature at 69 to 71 degrees, changing the bottle out every 12 hours. Works good enough that I just purchased my second conical fermenter and insulation blanket.

### ⭐⭐⭐⭐⭐ It fit what it was made for.
*by D***N on March 1, 2025*

Well made & fast delivery.

### ⭐⭐⭐⭐ Awesome for ales, lacking for lagers.
*by V***N on April 18, 2018*

Overall, this is an excellent product and I'm happy with it. However, I have not gotten it down to lager temperatures no matter how many frozen 2L bottles I put in it. I have 8 2L bottles in there now and my brew is at 62 degrees in a room with 70 degrees ambient temp, with swapping out half of the bottles daily. Getting fermenter temperatures in the 60's is no problem and that is great for ales, but I'll be doing my lagers some other way. The jacket is well made of good materials including a good zipper and I expect that it'll last a long time.

## Frequently Bought Together

- FASTFERMENT Conical Fermenter Fermentation Jacket fits up to 8 Gallons. Fermentation Cool Brewing Cooler Bag for Fermentation Temperature Control - Fermentation Accessories
- Fast ferment thermometer
- FASTFERMENT 70-0537-6KRJ Carrying Strap 7.9 gallon Carrying Strap

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-17*