You do not claim visibility in a studio - you prove it on the road, at six in the morning. Wowow makes reflective gear for athletes who train when it is dark. A strong product, with exactly that proof challenge.
The answer was not an ambassador, but a squad: 25 sportfluencers taking the gear into their training and posting about it in the same weeks. Local saturation in the feeds of runners and cyclists - people who know each other's routes.