Grainfather - Graincoat Insulation Jacket

Fits nicely

Fits snug (in a good way) and wipes clean easily. I've always had it on so I can't be for certain how much of a difference it makes.

works well

Only used one time, however it seems to help reach desired temperature quicker.

The Graincoat is essential

I have a Grainfather-30 240 volt unit, and it has a very slow boil when in 'step mash' mode without the Graincoat. The temperature reading on the unit hovers at 211 F without the Graincoat. The Graincoat is essential if you want to have a somewhat reasonable boil at the 212 F temperature. Note: when not in 'step mash' mode, and a temperature set to 212F the boil is very vigorous on my 240 volt unit. Be cautious when interpreting reviews of the Grainfather; I recommend not believing reviews that claim to have a reasonable boil without the Graincoat when the unit is programmed in 'step mash' mode.