Good value

Got too small a one, but rapidly replaced (excellent service) and its replacement fits well. Excellent constructions, comfortable, and fits well under my jacket over a single layer of a log sleeved 'T' shirt. Even the instructions are clear! Without connecting it up it kept me warm down to 4.5degrees. However I still haven't used it in anger and from all I've read and heard it will keep me toasty.

Toasty

Difficult to fault this one. I got a Small that I wear over a thermal top. Not tried medium or high yet. Low is plenty warm enough down to 4'c Nice that the jacket had connectors for gloves and pants. I assume the power controller will handle all of these? Tried connecting it through the bmw power socket thing, but that wouldn't supply 7amps, so I wired the supplied power lead to the battery with a 10a fuse.

Winter Bliss

I'm losing a bit of weight at the moment so I didn't want to spend £1k on some winter textiles which may not fit come the following year. As such, my Keis heated jacket is a god send, I have been wearing my ventilated mesh summer jacket (RST Ventilator 5) with the Keis and being perfectly warm in the November air. Once you try heated gear, you'll not go back.

Snug and sleek

A good looking, comfortable, thoughtfully-designed inner jacket that looks like an outer jacket. Woks with or without the heating controls as it's well-insulated. Worn it to go walking as well as for use on bike. The electrical connections are cleverly designed into the fabric and pockets of the jacket. I like the fact that it's both a smart fashionable jacket and a practical one.

Just the job!

This is a well designed and well made jacket and works really well, keeping chest back and arms nice and warm. I wear it over a thermal baselayer with the waterproof armoured shell jacket on top and, although there's been no frosty weather yet, I reckon it'll be more than adequate for all conditions. I wore it today on a high and windy route, temperature around 5C + wind chill, and used the medium setting for the first time. Low is usually enough. I bought size S on the advice of previous reviewers, even though my normal size is M/L, and the fit is snug but comfortable. It's well insulated and quite warm in its own right, even when switched off. It also looks good and will be ideal on touring trips when worn off the bike, and has plenty of useful pockets. Excellent value and a great addition to the bike wardrobe.

Well made & well warm

A well designed jacket. Arms are a good length and the fit is perfect for under your bike jacket. Just remember to size down from what you normally buy. Have only used the lowest setting so far but amazingly warm across the whole body, arms and neck. It's a wind blocker too, so even without the heat it is really effective. Easy to connect to your battery too.

Keis j501 heated jacket

Used twice, very impressed so far, looks well made.

Thoughtful design and well made

Very good design e.g. thin but high neck line that will work well with an outer shell. Impressed by the quality of the finish. Not sure about the sizing: I'm 1.85m & 90kg with long arms so took a size S, so while the body is snug the jacket arms seem to ride up. If I'd got the M maybe the arms would've been good but the body would not be tight enough? Covid stopped the Norway trip so couldn't test it. Service and advice from Sportsbike was bloody awesome.

Quality kit

Didn't know what to expect but very pleased with the results I took the advice of the other reviewers and went down a size and got a perfect fit haven't had chances to use it yet on a ride but did connect it up to the bike to try it out.

Why be without one?

Having been much acquainted with a Keis vest, eight years plus, I thought it about time I added the extras that this jacket offered. Getting a snug fit is important, so worth following the advice for a size smaller than you would normally do. The heat it provides is perfect in combating the cold. Even on the chillier days days that started with a light frost the low setting was adequate. Having the areas of the sleeves and collar heated in addition to the body makes a perfect combination for keeping the rider focused on riding. You soon notice how warm you have been when you disconnect from the bikes power cable. Don't use this jacket without the controller as the high setting is hot. The joy in not having to layer up resulting in a level of restriction in movement is most welcome. It is well made and fits like a glove.