Best harness for Border Collie chafing on hikes

Armpit chafing after long hikes is one of the most common harness complaints I hear, and it's genuinely miserable for the dog — three harnesses in and still no luck is frustrating. The essentials for hiking with a dog are a well-fitting harness, a collapsible water bowl, and depending on your terrain, possibly boots, because paw protection on rocky or hot ground matters more than most people realise. But let's solve the chafing first. Can you tell me a bit more — roughly how much does your Border Collie weigh, is she quite deep-chested or more leanly built, and what kind of terrain and distances are you typically covering?

That's a very specific failure pattern and it tells me exactly what's going wrong. Most harnesses use nylon webbing around the chest loop, and on a lean, active dog doing 15–20km with a lot of shoulder movement, that strap works against the skin repeatedly for hours. Wet conditions make it worse — wet nylon is essentially sandpaper. The solution isn't just padding, it's fleece-lined webbing that stays soft even when damp and doesn't bunch. What harnesses have you tried so far? I want to make sure I'm not sending you toward something you've already ruled out.

That's really useful — the Julius-K9 being the worst makes complete sense, because its chest strap is wide, stiff nylon with very little give, and it sits right in the armpit zone on a lean dog. The Front Range is better but the chest loop is still unlined. Given everything — full days, Scottish mountain wet, lean athletic build, and three failed attempts — the one I'd point you toward is the Ruffwear Flagline Harness. It has a single overhead loop design which dramatically reduces contact points under the legs, and the contact zones are all fleece-lined. It's built specifically for long-distance hiking and the reduced underarm contact is the key difference from the Front Range. It comes in sizes that should fit a 22kg Border Collie in the medium, but measure her girth before ordering because lean collies sometimes size down.

Yes, it does — there's a reinforced grab handle on the back panel, which is exactly what you need for lifting over stiles or steadying her on a steep scramble. The back panel is also quite structured, so it distributes the lift well without the harness twisting. One practical tip: when it arrives, put it on her dry at home and check that the chest strap sits below the shoulder blades rather than across them — that positioning is what makes or breaks the chafing issue on this design. If it's riding up at all, size down.

Good luck — I think this will be the one. Measure the girth snugly, not loosely, and if she's right on the border between sizes go smaller rather than larger, because a slightly loose chest loop is what causes the armpit contact in the first place. Enjoy the Scottish hills.