Rather than filter in brands, I'd rather filter out brands (aka exclude). Maybe just an include/exclude toggle there? A select all UI element, then deselect might also be adequate.

Funny that you mention that. That's how it originally worked, but I changed it to filter in brands because I assumed golfers are more brand loyal, and thought they might want to only look at the brands they normally play with.

I think your toggle idea is a good one though, and I'll look to implement that. I can see how some people might want that.