IDC®Longwalk Y-Harness

SKU: 19LWH-*

Availability: In stock

Size chart


Delivery time is +5 working days when ordering individual labels.


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Product Description


Designed for the
longest journeys

The IDC® Longwalk Y-Harness is specifically designed for extended walks, so when you get away from the city you’re not the only one to put on a convenient and healthy gear; you can give your dog the same comfort, too.


The IDC® Longwalk is designed to actively adapt to your movements. The three elastically attached rings react to both the dog’s and the owner’s motion, so Duo-Flex® makes sure that the harness is always comfortable even during the longest walks.

Chest circumference
Neck circumference
44-60 cm / 17.3-23.6 in
28-40 cm / 11.0-15.7 in
7-12 kg / 15.4-26.5 lbs
49-66 cm / 19.3-25.9 in
38-46 cm / 14.9-18.1 in
9-15 kg / 19.8-33.0 lbs
56-76 cm / 22.0-29.9 in
38-54 cm / 14.9-21.2 in
14-20 kg / 30.8-44.1 lbs
66-86 cm / 25.9-33.8 in
43-60 cm / 16.9-23.6 in
18-25 kg / 39.7-55.1 lbs
70-90 cm / 27.6-35.4 in
50-65 cm / 19.7-26.5 in
26-33 kg / 57.3-72.7 lbs
80-96 cm / 31.5-37.8 in
55-70 cm / 21.7-27.6 in
32-41 kg / 70.5-90.3 lbs

Active Dog,
Active Harness

The Duo-Flex® system allows the shoulder straps to constantly adapt to the dog’s movement on each step, so they only sense the harness when you want to stop or hold them back.

And your dog

Thanks to the active parts, the harness is so comfortable you don’t need to take it off even when you let your dog loose as they practically don’t feel it’s on them.

The longer you walk,
the more it benefits

The leash is also integrated into the Duo-Flex® system so when your dog suddenly jerks on it or you decide to pull them back, the active rings ensure a more gentle, dampened effect. The longer you walk, the more grateful your shoulder will be for the reduced tugging force.

Depending on the workload, the active components start moving gradually, in sync with each other.

The Duo-Flex® system is active both when the leash is taut and when you let your dog roam freely without the leash on.


IDC® Longwalk combines several innovations and developments into a harness that is truly dog- and owner-friendly. This superior quality is based on our 20 years of experience in harness design and manufacturing.



Red Dot Award-winning design and colours

Adjustable and openable straps – you can put on and take off the harness without having to pull the dog’s legs through

Hook-and-loop chest pads – the harness can be adjusted to the dog’s build and size

Neoprene lining and special internal structure – perfect fit and form

Rubberized handle for a secure grip

Reflective and phosphorescent elements

Interchangeable custom patches

Bag and flashlight attachment options

Easy to put on and use

Integrated Duo-Flex® system

Made in the EU using German materials

Continuous load testing

Product video

Customer Reviews (15)

Great harnessReview by Labrador lover
Overall rating
So far have only used the harness a couple of times so time will tell however I was a little sceptical as it lies higher up towards my lab’s neck than the original harness and also a different shape as the chest pad goes between her legs and I wondered if it would be restrictive for her. So far this does not seem to be the case and it seems comfortable for her. Ideally I want her to be comfortable running etc in it as she is very energetic.
Looking good so far! (Posted on 19/09/2020)
top harness Review by laurent
Overall rating
easy to fit. easy to catch the handle. top quality as usual with JULIUSK9
just one issue not from JK9 but from DHL. they charge me an extra 20€ for the delivery.
none other choice to pay. (Posted on 07/09/2020)
The best harness ever!Review by Sofia
Overall rating
Nya is a JRT. She is very particular about a lot of things. Born like that, not raised. After all, she has one brown eye, and one blue eye. She is an alpha, she was always trying to save her brothers and sisters from all nonsense. Extremely intelligent, brave and active. Well, she just did not like her harnesses. I had before bought Julius k-9 harnesses, but for my big dogs, Alaskan malamutes. I did not think a harness for a big dog would suit my tiniest of dogs. Well... I was wrong. The IDC Longwalk was loved by Nya from the very first day. She feels very comfortable with it. And of course, I must remember that a JRT is a very big dog in a very small body. The very best harness, both for the Boss, the Alaskan malamute, and for the Bright Star, the JRT. I can never recommend enough! Julius K-9 harnesses are the only harnesses worth their money. (Posted on 18/08/2020)
Great harnessReview by Andrzej
Overall rating
Great harness. It does, indeed, protect our joints if you have a dog that can pull more forward. Much of the energy is lost by the moving straps on the dog's torso. Besides, the harness looks great and is well made. (Posted on 14/08/2020)
Good Fitting - Needs some improvementsReview by Steve
Overall rating
The harness is very good looking and the overall quality is very good.
Fitting is good, I got a suggestion for the size from Julius Staff.
Having a very strong dog (31 kg Amstaff) I have to say I would suggest some improvements:
1 - The leash attachment ring got ovalized after the first walk, it's very very thin. That definitely needs to be substituted with a sturdier one.
2 - the transparent plastic on the top part gets teared very easily, I'd replace that as well.

This is the reason I am giving only 3 stars.
It is overall a good harness, but I have to say I would recommend it for strong dogs. (Posted on 01/07/2020)
EXCELLENTReview by Robin Hood
Overall rating
I ordered a Medium for my Springer Spaniel it fitted great but I suggest you measure your dog using the guide so you get it right. This harness is very well made and works great whilst being comfortable on Tyler dog even when running in and out of the woods, bushes and rivers. (Posted on 25/05/2020)
Product FantasticReview by Giorgio
Overall rating
The harness fits great on my staffy looks amazing and I’ve actually got compliments on it I 100% recommend this harness if you want a strong harness to hold up in country settings or just for your dog to be comfortable and cool looking in. Also the handle is comfortable and strong (Posted on 10/05/2020)
Best Choice everReview by Nuno
Overall rating
Having a Chow Chow which by it's breed is very stubborn and nor very social, this excellent harness made the walks more comfortable for him and for us. (Posted on 05/05/2020)
It’s great love it Review by john
Overall rating
This is a great harness for the country side my dog swims in it and runs through all different kinds of fields and it’s still in the shape I bought it in, he loves it too , he hasn’t really been a fan of other harnesses being on him when he got wet or dirty but he never has a problem with this one. The harness fits great on my staffy looks amazing and I’ve actually got compliments on it I 100% recommend this harness if you want a strong harness to hold up in country settings or just for your dog to be comfortable and cool looking in. Also the handle is comfortable and strong (Posted on 05/05/2020)
Great Harness Review by Sam
Overall rating
We own a pug and have used the Julius K-9 Powerharness which is great, but our pug likes to pull so wanted something that may help with that. The IDC longwalk harness is perfect for that. He seems to be pulling less.

The fit is slightly too big for him, but only just (we got the XS) but our pug is small. On reflection we would have ordered the 2XS as this would have fitted him better, however, there is no option on the website to order this size but it shows that it's an option on the packaging. Not sure why.

The price is a little higher than I would expect this product to be but I am happy to pay it for good quality.

The only thing I would say needs improving is the thickness of the rings that you attach a lead too. It is a bit thin and I'm not sure how long that would last. Other than that a great all round harness and would recommend it to anyone. (Posted on 14/04/2020)
No Size 3....Review by Riah
Overall rating
Size guide won’t fit my guy. We need this in a size 3...
IDC PowerHarness is the one we’ll have to go with.. (Posted on 12/04/2020)
Best Harness Ever!Review by Key2Love
Overall rating
I own a couple other Julius K-9 Power harnesses and liked those a lot but they don't compare to this new "Long Walk" harness. My dog loves this one! No more paws going over the front strap while napping. Stays nice and straight on her back while walking. I think it's a little pricey for what it is but well worth the comfort. The neck straps are fraying on the ends of the velcro which disappointed me but truly, this is a must have! (Posted on 27/03/2020)
Finally!Review by Jacqueline
Overall rating
I tried about 12-15 other harnesses for my dog - a labradoodle. NONE of the others came close to fitting her. What fit in the chest didn’t fit in the neck, and vice versa. She is deep chested but small every where else. In addition, I needed a harness that didn’t rub under her armpits. This harness checks all of the above boxes. It fits her well, doesn’t rub, and she walks normal in it. I am so happy to have finally found the perfect harness for her. Another note - I gave it 5 stars for the price because I spent a lot of time and money on other harnesses and this one is well worth its price. I find the quality to be top tier compared to the others I purchased. (Posted on 27/03/2020)
Good, but fundamental design flawsReview by Adam Zielinski
Overall rating
This is our second Julius K9 harness.

IDC Powerharness is great.

IDC Long Walk harness is a bit of a let down. Quality of the materials and the thought that went into it is second to none.
But.... few annoying things marks this otherwise good product down.

No 1 - main attachment ring - it is so thin that our leash came undone sever times. A bit no, no, no!!

No 2 - chest straps constananly become looser and looser. I have not found a way of securing them permanently, short of stiching them togehter.

Overall rating: needs some improvements. (Posted on 26/03/2020)
An excellent product for older dogsReview by Edward
Overall rating
Bought this harness for my aging dog. Works wonderful together with a elastic leash. Well Done with this product, Julius K9. (Posted on 23/03/2020)

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