Skip to product information
Pickup currently not available
The Harness Your Strong Dog Actually Deserves
Look, we'll be honest. If your dog pulls like they're auditioning for the Iditarod, you need a harness that won't let you down. The Heavy Duty Dog Sport Harness is rather splendid at keeping both you and your enthusiastic companion safe, comfortable, and in control during training sessions and daily adventures.
Why Choose Our Heavy Duty Dog Sport Harness
- Three D Ring Positions for Versatile Training Adapt to different training scenarios without swapping equipment. Whether you're working on lead walking, recall, or sport activities, this harness adjusts to suit your needs.
- Fast Release Mechanism Get your dog in and out with marvellous ease. No fumbling about with complicated buckles when you're in a hurry.
- Breathable, Lightweight Material Because comfort matters just as much as control. Your dog won't overheat, and they'll forget they're wearing it entirely.
- Fully Adjustable Straps A proper fit means maximum security and zero escape artist moments. Customise the fit to your dog's exact measurements.
- Padded Design for Long Wear Durable padding cushions your dog during extended use, whether you're out for an hour or tackling a full training day.
- Built for Larger Breeds Engineered with robust fabric and secure construction specifically for dogs that, well, have rather a lot of muscle.
Product Details
Size Guide
| Size | Lower Neck Measurement | Chest Girth Measurement |
|---|---|---|
| Medium | 15.0 inches (38 cm) | 15.7 to 23.6 inches (40 to 60 cm) |
| Large | 17.3 inches (44 cm) | 17.7 to 27.6 inches (45 to 70 cm) |
| Extra Large | 19.7 inches (50 cm) | 23.6 to 39.4 inches (60 to 100 cm) |
| Extra Extra Large | 23.6 inches (60 cm) | 27.6 to 47.2 inches (70 to 120 cm) |
Material Heavy duty, breathable fabric with reinforced stitching
Fastening Secure quick release buckle system
Ideal For Large breed dogs, training activities, and daily use
Take control of your walks, improve your training outcomes, and give your dog the comfort they need. This harness won't last long at these prices.
Questions about sizing or fit. Our support team is here to help.
SHIPPING + RETURNS
THE RATHER IMPORTANT BITS
This rather lovely piece ships directly from our brand partner - we work with independent brands who are absolutely brilliant and work frightfully hard to create beautiful things.
SHIPPING DESTINATIONS
Now, here's the thing - our wonderful brand partners ship to lots of different places, but not all of them can ship worldwide.
Some are brilliant at international shipping, others prefer to keep things closer to home.
At checkout, you'll see exactly where this particular brand can send your goodies.
We're terribly sorry, but shipping costs do vary rather wildly depending on where you are in the world. The exact figures pop up at checkout - no nasty surprises!
RETURNS
You have 14 days to return items.
Now, we absolutely adore our brand partners - they work incredibly hard and we do try to support them as much as we possibly can. So I'm rather afraid we have to pass the return postage costs back to you. Frightfully sorry about that!
🌍 PLEASE CHOOSE THOUGHTFULLY:
Our wonderful partners put their hearts into everything they make.
Ordering multiple sizes to try at home is rather hard on our planet and makes things jolly difficult for these brilliant independent creators.
When in doubt, do ask us first!
PAYMENT
We're frightfully modern and accept all the usual suspects:
Visa, Mastercard, American Express, PayPal, Apple Pay, Google Pay, and Shop Pay
SECURE AS HOUSES
Everything's properly encrypted and secure - your details are safer than the Crown Jewels!
All prices in lovely British pounds £ GBP, though international chaps will see converted prices.
Any payment pickle? We're here to help sort things out! Contact us
We Have Lots More Like This.........
Hello, we are Sostter....
Sostter began, as all good ideas do, with a lively conversation and a shared sense of frustration. Why had the world of independent design become so serious, so samey, so… beige? Where was the spark, the imagination, the sheer joy of discovering something that made you stop and stare?
We dreamt of a marketplace that celebrated difference — where curious minds could explore a world of independent brands, design-led makers, and thoughtful artisans. A space that felt exciting, human, and beautifully imperfect.
Today, Sostter brings together remarkable people and their creations — from London to Lausanne, Brooklyn to Berlin — uniting makers and discoverers through craftsmanship, creativity, and conscience. Every object tells a story, and every purchase supports an independent brand doing things differently.
This is just the beginning. But enough about us — step inside, explore our world, and see what catches your imagination.
Giving Back
We’re proud to support Sutton Night Watch, a grassroots UK charity making a real difference in the lives of those facing homelessness. Through regular donations of stock, supplies, and essentials, we back their mission to offer warmth, dignity, and practical help to anyone in need — right where it matters most.
Sell with us
Sostter partners with independent brands that intrigue, inspire, and bring something genuinely different to the world of fashion, design, and living.Join us!