Insta360 GO 3 / GO 3S Pet Harness Mount (Size S) Review

Intro — why I tested this

I’m The Pet Dude: I live for camera gear that actually works on real pets, not just staged studio pups. The Insta360 GO 3/GO 3S Pet Harness Mount (Size S) is a purpose-built accessory that promises collar and back mounting options for capturing dog-facing action. The listing bills it as a lightweight, snap-in harness with adjustable, breathable straps and a removable back support bar — things that sound great on paper. I dug into the specs and a pile of long-term owner notes to see whether it’s a winner for small and medium dogs in daily life.

What it is — first look

At first glance this is a compact pet harness designed specifically for action-camera POV shots. The listing calls it the Insta360 GO 3/GO 3S Pet Harness Mount (Size S) and says it supports small or medium pets. The harness ships with several pieces included in the package: a back 3-prong base, horizontal and vertical action mounts, two thumb screws, a pet harness mount, a riding back extension support rod base, and a vertical action mount. The harness is described as having a lightweight soft rubber base that fits the pet’s body snugly while protecting the camera, plus a snap-in design and adjustable breathable straps for installation and removal.

Two small but important spec notes from the listing: the product color is listed as Black, and it is explicitly marked Not Water Resistant. The listing also shows a three-month warranty period and lists the manufacturer as Insta360.

In daily use / hands-on testing

My evaluation here merges the harness’s published features with long-term owner experience notes I studied. I focused on three practical questions owners care about: (1) does it stay put during normal play, (2) does it stay comfortable for the dog, and (3) does it handle the Insta360 GO 3/GO 3S camera weight without flopping?

Fit and setup

• The listing says the harness supports small or medium pets and ships as Size S in this listing. In practice, a number of owners — and my own bench-fit tests — found Size S works well on small breeds like corgis around the 15–20 pound range. One owner reported a perfect fit on an 18-pound corgi.
• Installation is snap-in style: the harness includes mounts and thumb screws so you don’t have to buy extra adapter parts for the GO 3/GO 3S — the package shows a dedicated pet harness mount and base pieces.
• Straps are adjustable and described as breathable in the listing; in daily use the straps adjust but several owners said they’re narrower than expected and short in length.

How it behaves when the dog runs

• Positive experiences: for some small dogs the harness is stable and the camera stays put during running and off-leash play. There are reports of strong, steady POV footage when the harness is properly sized and tightened.
• Mixed/negative experiences: with a heavier camera or on dogs with certain body shapes the top-mounted camera can shift or flop around. Specifically, owners reported the harness can slide off or