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IDC®Longwalk Y-Harness

SKU: 19LWH-*

Availability: In stock


From €69.99

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.

Neck circumference
Chest circumference
26-34 cm / 10-13 in
40-52 cm / 16-20.5 in
4-8 kg / 9-18 lbs
28-40 cm / 11-15.5 in
44-60 cm / 17-23.5 in
7-12 kg / 15-27 lbs
38-46 cm / 15-18 in
49-66 cm / 19-26 in
9-15 kg / 20-33 lbs
38-54 cm / 15-21 in
56-76 cm / 22-30 in
14-20 kg / 31-44 lbs
43-60 cm / 17-23.5 in
66-86 cm / 26-34 in
18-25 kg / 40-55 lbs
50-65 cm / 20-25.5 in
70-90 cm / 27.5-35.5 in
26-33 kg / 57-73 lbs
55-70 cm / 22-27.5 in
80-96 cm / 31.5-38 in
32-41 kg / 70-90 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 and German Design 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 elements

Interchangeable custom patches

Bag 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 (37)

Best harness ever for active dogsReview by Walter
Overall rating
We were looking for a safe harness to be used during long mountain trekking. Traditional harnesses are discomfortable for our boy, limit movements and cut his hair. All another story with this Julius K9 IDC HARNESS: it supports any movement, doesn’t compress the joints and doesn’t damage the hair. Our border collie acts as if he is not wearing anything during our mountain adventures. (Posted on 23/04/2022)
Great product!Review by Ines
Overall rating
Great harness, both very soft and strong! Very easy to put, follows every movement of our dog perfectly and it doesn't disturb her in any way.
While connected on a leash, the harness does not slip aside or turn around the dog, fits always right and it stays always on the right position, no matter which side our dog turns on.
Very good and easy adjustment system with an quite big range between minimum and maximum, both on chest and around the neck.
Since our dog is still growing and has not turn his adult size yet, we are sure that our L size harness will perfectly follow her body changes.
Thank you!
(Posted on 14/04/2022)
Great for long walks/trails Review by CNunes
Overall rating
It is very resistant, waterproof and fits perfectly. This harness is very good, since the dog does not pull like with the other harness, he stops just before the leash runs out. We have a 10meters leash for our trails and the harness is perfect since it protects the dog (seems very comfortable and our dog accepts it very well) and allows for perfect control even at a distance. The handle is also good to pick up the dog in different situations like going into the jeep, crossing a creek, …. For our Scottish Terrier we got the S/Mini size, the price is a bit high compared with the other harness. The delivery was very fast and the service very good. (Posted on 27/12/2021)
Good productReview by Daniele
Overall rating
I have many Julius harnesses ; all are very good products.
This one is very useful for long walks .
(Posted on 20/12/2021)
Great product, durable and a perfect fit for the dog :) Review by MM
Overall rating
Great product, durable and a perfect fit for the dog :) A bit on the high side where price is concerned, but if it lasts long, you would certainly get the value for money. I tried different harnesses before this one and by far this is the best I got. (Posted on 31/10/2021)
The best harness for dog ever!Review by Mirco
Overall rating
The best harness for dogs ever! Robust and made with quality materials. Absolutely safe for the dog, adjustable to adapt perfectly to its growth. The only flaw is that it is little reflective, it would be useful if it were especially when walking in the evening! I already had two, this is the third because my puppy is grown. I will not buy any other brand, although the price is a bit too high worth the expense. Absolutely recommended. (Posted on 17/07/2021)
Excellent quality, very comfortable for dogsReview by Jonas
Overall rating
Top quality in all regards (Posted on 15/06/2021)
Quick delivery and good gearReview by Ric
Overall rating
Very nice gear. My dog is very comfortable when we go trekking, and so am I. (Posted on 14/06/2021)
Good quality and great service Review by Mare
Overall rating
My 9 year old Border Collie loves to pull on the le (Posted on 05/06/2021)
Very Good, beautiful and functionalReview by Carlotta
Overall rating
It was all perfect.
My dog ad I love it.
I have a quite big American Satfforshire that's tall and about 30kg and I ordered an L.
The size was godd but at the limit. (Posted on 12/05/2021)
Perfect Review by Odin
Overall rating
Our dog loves the harness. It sits perfectly on his body, doesn’t disturb him in his movement and he can not get out of it. It’s of good quality and works well in every weather. (Posted on 29/03/2021)
Simple brilliant!Review by Maggie Moo the Labrador
Overall rating
My pawrents got me this new harness to make my country walks even more comfortable. Fits brilliantly and so so comfortable. I would recommend to everyone. I could even get my ‘Ball Junkie’ patch to match my original harness. (Posted on 20/02/2021)
PerfectReview by enzo
Overall rating
Ottima pettorina. Consigliata (Posted on 15/02/2021)
PerfektReview by Sasa
Overall rating
Ich muss gestehen, ich habe lange überlegt ob ich das Geld in die Hand nehme zumal ich keine Möglichkeit hatte zur Anprobe zu ordern.
Hinuz kommt dass meine Wolfhunde idR keine Geschirre dulden weil sie unbequem sind, und dass sie Meister im raus schlüpfen sind.
Nicht einmal Sicherheitsgeschirre können einen Wolfhund wirklich aufhalten.
Als das Geschirr ankam musste ich zu meiner Freude feststellen dass die Größenangaben wirklich korrekt sind und Größe L relativ groß gestellt perfekt passt.
der erste Einsatz war dann im Auto (das Geschirr wurde nicht durchgebissen, was für den bequemen Sitz und die tolle Passform spricht) beim Tierarzt angekommen kam der erste Härtetest, wer schonmal einen Angsthund erlebt hat hat eine Vorstellung wie meine Wolfhunde sich verhalten wenn sie nicht möchten / Angst haben.
Vorsichtshalber hatte ich doppelt gesichert am IDC Longwalk und zusätzlich am maßgefertigten selbstgemachten Zugstopphalsband, wäre nicht nötig gewesen, das Geschirr sitzt nicht nur bequem sondern auhc sicher.
Auch beim Spaziergang an der Leine als auch frei laufend fühlt meine kleine sich nicht gestört.
Fazit: eine wirklich gute sinnvolle Investition an der wir aufgrund der qualitativ tollen Verarbeitung ein Hundeleben lang Freude haben (Posted on 22/01/2021)
Very goodReview by Romulus Gabriel
Overall rating
Very good quality. Julius product= best (Posted on 21/12/2020)
Great choiceReview by Savannah64
Overall rating
We are ready happy with this harness. Great quality, easy to clip on and off, the handle is very useful. Highly recommend (Posted on 29/11/2020)
Worth every penny.Review by Spring
Overall rating
Well made, adjustable and never comes off the dog unless you undo it.
All in all worth every penny. (Posted on 27/11/2020)
Super quick delivery...excellent productReview by Sally
Overall rating
I have 2 bulldogs and have purchased 3 for each of my dogs as they go through there growing stages.
The last two were the long walk harnesses....and they are super...the only fault I have is these products were out of stock in the UK so the p&p was quite steep...but other than that they are excellent (Posted on 06/11/2020)
ExcellentReview by Clara
Overall rating
We have a Julius K9 for our puppy and wanted equal quality for our older dog. She is a Podenco and, similar to a greyhound, is an awkward shape for standard harnesses. After using the measuring guide we ordered a medium and it fits great. A little awkward to adjust but once done it is secure, comfortable and tough.
It will last a long time so although pricey will work out cheaper. Great product and would rebuy. (Posted on 12/10/2020)
Great Review by Evie
Overall rating
Love this, our dog is really happy and looks super cute with it on (Posted on 11/10/2020)

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