• featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
  • featured image of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
1 Million products sold, happy dogs worldwide

Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta

£34.99 £27.99 -20%
The TRI-Harness® is designed to give dogs a safer, more comfortable walking experience without pulling, rubbing, or restricting movement. After... View Full Details
  • Anti‑Pull Control for All Breeds
  • Full‑Body Comfort & Freedom
  • Secure, Adjustable, Everyday‑Ready

Product Options

Colours: Magenta
Sale
Size: Select Size

Not sure? Try our Size Guide for the perfect fit

Stand out from the pack

Personalise your product (+£4.99)

Make it Theirs

Select Font:

Select Colour:

Select Icon:

Guidance & examples

Size & fit

The stitching area on our XXS, XS and Small sizes is limited; we advise having a maximum of 5 characters and not adding an icon.

Examples from the pack

Red harness with yellow text in hobo font
Red harness with yellow text in hobo font
Tan harness with blue text in BullyBillows font
Tan harness with blue text in BullyBillows font

About personalisation

Important - Creating your unique look with our bespoke stitching/engraving quality could take us up to 7-10 working days to complete, it's well worth the wait though.

When customising the Combat Range, the adjuster may cover part of the text. The best way to help avoid this is to choose the smallest size which will fit your dog; the adjuster will then be located at the end of the collar away from the name.

Preview images are for illustration only, text and Icons will always be centered neatly on the product. Colours and fonts may change very slightly during production.

We offer personalisation option on almost all of our Collars, Leads and Harnesses. What are the key benefits of adding personalisation to your BullyBillows gear?

1. They're unique to you and your dog.

2. If you have multiple dogs, adding your dogs name can help to distinguish which collar is for which dog.

3. Adding a phone number and Social handle in the unfortunate event of your dog getting lost, this is a very powerful way to ensure your dog can be tracked back to you.

4. If you have a working dog, nervous dog or one who just loves to jump, you can enter names such as POLICE DOG, WARNING, DO NOT PET, NERVOUS etc.

Your Dog Needs This

Training Double Ended Dog Lead | 2m Length - Magenta

£25.99
Training Double Ended Dog Lead | 2m Length - Magenta

The chest measurement of your dog, or the girth, is the first measurement you’ll need to take. This can be taken by placing the measuring tape around the widest part of your dog’s torso, usually just behind the front legs.

The next measurement should be taken around the lower part of your dog’s neck, simply measure the widest part at the base of the neck as this is where the harness is going to sit. This size chart is based on min-max measurements.

Size
Neck Girth
Chest Girth
Chest Length
XXS (MINI A)35cm-55cm33cm-49cm21cm-32cm
XS (MINI B)40cm-60cm40cm-58cm22cm-39cm
A43cm-64cm50cm-66cm23cm-32cm
B60cm-71cm55cm-80cm27cm-39cm
C65cm-91cm65cm-90cm28cm-40cm
D69cm-108cm70cm-108cm29cm-44cm
Size chart for Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta
kg

Measure around the base of the neck where a collar would sit.

cm

Measure around the widest part of the chest, just behind the front legs.

cm

Measure from the base of the neck (where a collar sits) to just before the last rib.

cm
Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta

Product description

The TRI-Harness® is designed to give dogs a safer, more comfortable walking experience without pulling, rubbing, or restricting movement. After listening to thousands of owners, we’ve combined our Mini and Standard versions into one complete size range, making it easier than ever to choose the perfect fit for your dog.

Built with a non-restrictive Y-shape, soft neoprene lining, and three strategically placed attachment points, this harness supports natural movement while giving owners full control. Whether you’re training a puppy, managing a reactive dog, or simply want a more comfortable daily harness, the TRI-Harness® delivers reliable performance for every breed.

Optimized for Every Body Type

  • Mini Series (Mini/A – Mini/B): Uses a slimmer 2.5 cm webbing, perfectly weighted for toy and small breeds.
  • Standard Series (Size A – Size D): Uses a robust 4 cm webbing, providing the necessary strength and surface area for medium to extra-large dogs

Key Features

  • Three Attachment Points: Versatile options for training, control, and everyday walking
  • Non-Restrictive Y-Frame: Ergonomic design that allows for full shoulder and joint movement.
  • Soft Neoprene Lining: Premium comfort that reduces rubbing and protects sensitive skin
  • Anti-Pull Front D-Ring: The ultimate tool for training and correcting pulling behaviour.
  • Durable Webbing: Size-specific width (2.5 cm for Mini / 4 cm for Standard) for maximum safety.
  • Secure Buckle System: High-strength fasteners for easy on/off application.

Benefits

  • Improves Lead Manners: Gently reduces pulling without causing pain.
  • Protects the Neck: Prevents dangerous pressure on the trachea and throat.
  • All-Day Comfort: Lightweight, breathable construction suitable for long hikes or city strolls.
  • Universal Fit: From Chihuahuas to Great Danes—one design, perfected for all sizes

Ideal For

  • Small Breeds & Puppies: Mini/A and Mini/B (formerly the "MINI TRI-Harness").
  • Medium to Extra-Large Breeds: Size A, B, C, and D (formerly the "Standard TRI-Harness").
  • Strong or Reactive Pullers: Provides the control needed for safer management.

Size & Fit Notes

  • Mini Series: 2.5 cm webbing width.
  • Standard Series: 4 cm webbing width.
  • Consistency: The design and functionality are identical across the range; only the webbing width is adjusted to suit the dog's power and scale.
  • Measurements: Please refer to our Universal Size Guide image for Neck, Chest Girth, and Chest Length measurements

Trademark & Copyrighted Design Rights Number: 6189802

Hear it directly from our ambassadors

@gsdbear

@gsdbear

Once you’ve tried BullyBillows, you’ll never go anywhere else. The quality and range of their products is unmatched, and the team are just fantastic. We’ve been with them since 2020 and we’ve never looked back!

@meko_xlbully

@meko_xlbully

BullyBillows combines strength, comfort, and style perfectly for dogs like Meko. We absolutely adore BullyBillows.

@thepuggysmalls

@thepuggysmalls

We have so many goodies from BullyBillows, from harnesses, leads, dog chews and beds, they tick all the boxes to keep my precious pugs happy, cosy, safe and oh so stylish!

@swedishbulldogfamily

@swedishbulldogfamily

Finding products that our bulldogs genuinely feel comfortable wearing changed everything for us, and that’s exactly what BullyBillows gave us.

Customer Reviews

Overall rating: 4.9 / 5 from 214 reviews.

Customer photo review of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta

Aston absolutely loved her new harness ! I now wish we’d got her name on that too! Next time! We went for a really long walk and she walked like a princess - people have already started asking us where we got the collars and harnesses from.. only one place!! BullyBillows!! 🐾🐾

J G. 5/5 Verified

Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta

Customer photo review of Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta

My rescue Akita can be temperamental when dogs bark at her, she is 41kg and I have always used Julius K9 harnesses for my last boys but Zuki didn't seem as secure in it. Always looked at BB but never took the plunge until a friend did. Taken Zukes out tonight on it and it was a dream walking her. Luckily she has a long neck otherwise I wouldn't be able to fit the collar and harness on together but highly recommend.

Victoria B. 5/5 Verified

Anti-Pull TRI-Harness® | Training Dog Harness for All Breeds - Magenta

Customer photo review of Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

This is our second tri-harness and they are definitely the best we've ever used! They are strong, durable and the colors are a bonus! We've just got the ladder lead and so far it's working brilliantly for MoMo's training!

Jenna C. 5/5

Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Customer photo review of Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

So far Nala (once a naughty puller) seems much happier wearing the harness. I do wish the lead had a loop half way for more control. I’m going to look at your leads though as love the matching colours.

Nicola M. 5/5 Verified

Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Customer photo review of Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Love it! Definitely what I was looking for. My only complaint is that it's at its tightest at the neck and is a bit loose still whereas it's almost as loose as it can go around the chest but still a bit tight, other than the odd sizing I'm so happy with it. Very convenient that is has 3 spots to hook and the one on front does help her not to pull.

Kaitlyn T. 4/5 Verified

Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Customer photo review of Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Nyla looks lovely in her new harness and it doesn’t restrict her as much as the other one did, it’s better for in the car too, I feel she is safer when strapped in with this harness as it’s so well made and strong, but well padded so doesn’t hurt her

Julie F. 5/5 Verified

Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Customer photo review of Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

I got a tan one for Rusty then we rescued Ruby so she absolutely has to match her brother. The ring on the chest is incredible for stopping pulling too More importantly they both look so smart people are less intimidated and both my cuddlers are getting more loves ❤️

Ray R. 5/5 Verified

Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Customer photo review of Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

GAME CHANGER !!! Dottie loves to walk but it doesn’t matter where we are on the roads or on a trail she would march from start to finish ! 1hr 2hrs she wouldn’t stop … Though we would give the training harness a go after reading the reviews on a few different brands ! Turned up super quick ! Wifey took her out the first time said she didn’t pull once !! Came home took Dottie out and actually thought I had a different dog ❤️ honestly couldn’t tell you how and what it did to stop her pulling but like I said GAME CHANGER

Jamie M. 5/5 Verified

Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Customer photo review of Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Lovely colour. My girl gets lots of compliments with this harness. Works well over jackets/jumpers etc when weather is cold. Would advise to measure multiple times to ensure correct size is purchased. Item also washes well, colour hasn't faded. Very pleased, I am just waiting for the lead in the same colour to return in stock. Would recommend the item.

Kirstie E. 5/5 Verified

Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Customer photo review of Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Fair delivery times. Easy to follow guides on measuring and fits as expected. Quality material I just know it will last. Only disappointment was two days later it was on sale for 15quid less! Not Bully's fault, just luck of the draw. Will definitely purchase from this company again.

Naomi H. 5/5 Verified

Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Customer photo review of Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Very happy with our harness and collar. Had to exchange our original purchase as I measured wrong but staff were very helpful and I must say we are thrilled with the quality of product as well as the level of customer care we received. Thank you very much 👏👏👏

Ysabel A. 5/5 Verified

Training Anti Pull TRI-Harness® | M-XL Breeds - Magenta

Customer photo review of TRI-Harness® | Anti-Pull, Adjustable & Durable - Dog Trainers Choice - Magenta v2.0

Decided to try this because I'd seen it had good reviews and honestly I'm so glad I did, I've got a cane corso x great dane who is a nightmare for pulling and training was going nowhere she's very stubborn but this harness had changed that, I didn't think it would make this much difference but we can now have nice pleasurable walks without dreading being pulled all over the place! If you're thinking about buying this harness.. do it, you won't be disappointed!! And the colour is absolutely stunning too 😍

Vikki P. 5/5 Verified

TRI-Harness® | Anti-Pull, Adjustable & Durable - Dog Trainers Choice - Magenta v2.0

Customer photo review of TRI-Harness® | Anti-Pull, Adjustable & Durable - Dog Trainers Choice - Magenta v2.0

Very sturdy material, the colour is 👌🏼 I bought size B for my 10 month old English staff, still some wiggle room on the tightest fittings, I overestimated her size even with measurements. She seems comfortable and happy with wearing, and the front ring does help with pulling compared to collar and lead combo.

Jodie L. 5/5

TRI-Harness® | Anti-Pull, Adjustable & Durable - Dog Trainers Choice - Magenta v2.0

FAQs

How to put on a dog harness

Start by unbuckling the harness and having your dog sit or stand still next to you. Slip the harness over their head and pull the straps underneath their tummy. Or, if you have a step-in harness, place it on the floor and help your dog place their feet correctly, before pulling it up over their back. Fasten it up securely, making sure it’s not too tight or too loose, and adjust accordingly.

What is the best dog harness?

The best dog harness really depends on the breed, size, and activity level of your dog. The comfortable Hurricane Harness features a useful handle and is super lightweight, while the Premium Harness is a great all-rounder for any dog. The traditional slip-on harnesses offer quick and easy fitting, while step-in harnesses might be better for dogs that dislike harnesses going over their head. And if your dog pulls, the TRI-Harness helps with training to prevent excessive pulling on the lead. You can read more in our Dog Harness Buying Guide. All of our harnesses are lined with Neoprene which is soft and helps avoid harsh burns unlike other brands.

How to measure a harness for a dog

To measure your dog for a harness, grab a measuring tape and wrap it around the widest part of their ribcage, then measure their neck at the base (where the collar sits and not in the middle of the neck). Make sure that the measurements aren’t too tight, but are secure enough that the harness won’t slip off if your dog pulls. 

If you have the harness already, try it on your dog and make sure you can fit two fingers between the harness and their body. Finally, monitor your dog’s behaviour - if they’re showing signs of discomfort or walking awkwardly, it may need adjusting more to suit your dog.

How to use a dog harness correctly

To ensure you’re using your dog harness correctly, you need to make sure it’s properly fitted. This means that it’s tight enough to prevent the harness moving, but loose enough to allow your pooch to move comfortably. Attach your lead to your chosen D-ring, whether that’s on their back or their chest, and get ready for your adventure!