J601 ULTRAFLEX Heated Jacket

It arrived quickly and was in good condition. This is my second one and I wouldn’t be out on without this in the winter.

Well made jacket,
Good fit
Heated controller is essential and makes wearing the jacket flexible for very cold days to milder but chilly rides

Great product and great customer service

I started out with the gloves which are the 09’s really warm. This time I went for the jacket. Perfect fit & nice & warm, the kit is superb quality. Gonna get the pants next ready for next winter. Once you get into the groove of connecting the plugs it really does help your riding experience.

Very nice product but not perfect, eg the sleeves are weirdly loose fitting, and the neck is also very large. I added Velcro at the neck so that it fits tighter. I wish there were more than 3 settings for the heat levels, as 5 levels would be more useful. Otherwise, all good. Oh and even though I bought and paid in euros, the delivery came from China and I needed to pay a ridiculously large amount in import duties about 50% the price of my items!

Why oh Why didn’t I do this years ago 😂. The Gloves are comfy warm and brilliant. The jacket is fab. Tbh I don’t want to go home now with these on.

Stretchy and comfortable to wear and lovely and warm. Only had on lowest setting so far so I'm sure it will be toasty all winter.

Decided to hold out for the new stock of 601 ultraflex and happy I did, had hoped to get it in time for a recent trip but it wasn't to be, and a very cold few days away made me glad it would at least be waiting when i got back. Fast communication,
very smart and stylish, appears well made, very easy to fit leads to bike. Decided after watching reviews that I needed a medium to achieve a snug fit and get maximum effect, but at 6ft and 14.5st I worried it would be too tight and changed my mind, ordering large at last minute. Mistake! I wish I'd stuck to my first choice of medium, test rode this weekend, not particularly cold day but I had to be on high setting to feel any heat and never got hot enough to have to turn it down. At high speed the wind presses the jacket against your chest and you immediately feel the difference, so I imagine a snug fit would have been understandably so much more effective, but without fitting to the bike and test riding with your own gear it's always going to be hard to gauge. Fit is a personal preference and It's a fine line between snug but comfortable and simply to small. I spent ages watching and reading reviews and still got it wrong. Can't knock the kit, just my size choice.

Heats up quickly and is a great bit of kit

Fantastic quality

Fits perfectly and I’m a 136kg 6ft 1 big lump warms up really fast can’t wait to try it out on my bike .ordered the 501 jacket in error first I called Keis and they cancelled and refunded the money instantly so I could order the correct coat extremely helpful 5* in my opinion

Fantastic in really cold weather allowing total concentration and safety

Very happy with my purchase this is the 3 item for this company

Back into biking after a 25year break ( not my choice) the bike would have been packed away long ago... heated gloves, trousers and the jacket... absolute game changer. Great quality, comfy and Warm

I pondered getting this item, not knowing if I really needed it. Now that I've got it I'm pleased with it and wish I'd got it sooner. I've only needed the lowest setting so far as it's not very cold out. Easy installation and quality material, all in, very pleased.

A well thought out bit of kit.

I have used Keis stuff for years. From about 2013. Suffering from a couple of arthritis type illnesses means that Keis keeps me on the road when ever the temperature falls below 15deg c and as I cannot travel by car due to the pain this causes me, really does mean that Keis keeps my life rolling along. I decided to try the J601 as my new Knox jacket was a bit restrictive with my current Keis underneath.
It had made it much easier to move about and far more comfortable, which is a massive plus when you are already in pain and any uncomfortableness really just adds to the pain levels. Warm enough but not quite as warm as my current Keis jacket but suspect that is down to the new controller. I still have the really old controller with 4 levels which I will try.
Would I buy same again if I lost it? definitely!!
And this one folds up easier so it can go in my tail pack for the cold evenings.
Thanks Keis!

Grate quality, lovely and toastie, definitely a must in cold weather. Bit of a faff plugging in at first use, but now I couldn't do without it.

This is a lot thinner than the 505 jacket, so less going on, under your MB jacket.
It is really hot once on and easy to control, with the controller... (very hot without it)
If it gets warm on the day, it is a thin layer, so your not sweating, with Two jackets on..
I wear with a long sleeve T shirt and MB only...
Get the size down, so its a tight fit..... very stretchy material on this too...

Have now got full set up. Socks,trousers, jacket and now short gloves. Game changer when cold. Excellent quality. Can now stay out on bike for hours .when cold

I ordered the size as per the size guide and the jacket was a very nice fit.
Wow this jacket is hot, I wore a thin base layer under it and took out the thermal liner in my motorcycle jacket, so I could give it a good test on a very cold day. I started on the medium setting and initially didn't feel much heat, so I put it on to full power. Had to stop 5 mins later to turn it to the medium setting, and then stopped again after another 5 - 10 mins to turn it to the lowest setting, which proved to be nice and cosy. Very impressed with this jacket and I am going to order the trousers to go with the gloves and socks I purchased with the jacket (reviewed separately)

An excellent product. I initially thought there was an issue with the heat controller - but it turned out that it was ‘operator error’. However, the personnel at Keis were extremely helpful and thorough, and the ‘issue’, ( me not holding the power on switch down for long enough!), was quickly identified.
Only used it once so far, but it was plenty warm enough on the lowest setting. I’m looking forward to trying it during our next really cold spell.

I had put off buying a heated jacket but now wish I'd done it earlier.
I went for this jacket as I didn't want another thick layer under my outer waterproof jacket and it feels about right for me. It's pretty light and easy to get comfortable once all closed up. The neck isn't too high either, which was another detail I was trying not to get wrong.
Most of the time I use it on the lowest setting which is just enough to eliminate wind chill through my unlined, laminated Rukka outer layer. I wanted maximum flexibility with my layer options and so far I'm not regretting my choices. I expect I will use the mid setting once we get into sub zero temperatures. The jacket keeping my core warm together with bikes heated grips is doing it for me.
The power lead is just long enough to get off the bike, switch the jacket off and unplug it. Using the (wired) heat controller with winter gloves on is fiddly so I tend to switch it on and leave it tucked out the way.
It seems a well made garment so should stand the test of time. It will now be a default item of winter bike gear for me getting daily use as I commute on my bike as much as possible.
I would recommend these heated jackets to anyone riding a bike during the winter.

This is my first Keis product, along with the shorty gloves, and i have to say im blown away by the quality, fit, and the products ability to keep you warm. I would recommend Keis to any rider now. Fabulous kit!!

Originally bought a slightly too small jacket but Keis changed it for the next size up with no hassle. This jacket is a huge leap in performance to my old heated waistcoat and on a 180 mile ride where the temp never got above 5 degrees it kept me toasty warm. In fact the high temp setting was too hot most of the time. Kept it on medium mostly and was hugely impressed. Excellent overall.

A game changer in winter motorcycle riding. Switching it on is like turning on a warm water tap. The warmth trickles down your back, arms and chest keeping you toasty warm. It really does allow you to concentrate on your riding and not be distracted by being cold.

Excellent item, best yet

Picked up this over the other jackets sold in the range for the ability to flex and I, lt doesn’t disappoint. I like that it flexes as I twist my body and doesn’t feel like I am wearing a jacket underneath. It also keeps me nice and warm as it should.