Hidden continuous ridge vent came on the scene about 25 years ago. The keyword here is 'continuous'. With continuous ridge vent, ventilation is more even and dead spots are virtually eliminated.
Ridge vent is 2 1/2 times more efficient than standard vents. The roof also looks cleaner because all those ‘box’ or ‘mushroom’ vents have been eliminated.
This product comes in multiple brands and styles. The best ones have a baffle to ward off wind-driven rain, along with a fiberglass screen inside to prevent bug invasion. This product is a very good bang for the buck.