How should an enduro helmet fit with goggles?

The goggle strap should sit flat against the back of the helmet without gaps, and the goggle frame should nest seamlessly against the helmet's brow and visor with no exposed forehead skin. The visor should be adjustable enough to accommodate the goggle frame underneath when pushed up for storage. If there's a gap between the goggle and helmet, debris and sunlight will enter. Try your specific goggle and helmet combination before purchasing, as compatibility varies between brands.