I’ve combed through countless hot tools, dental devices, and skin care gadgets to find the best Prime Day beauty deals. If you're shopping for other gadgets and gizmos, check out our Best Prime Day Deals roundup or our Prime Day liveblog. A Powerful Dyson Hair DryerThis is a pared-down Dyson hair dryer. Our Favorite Budget Hair StraightenerAs seen in our Best Hair Straighteners guide, Conair's Infinity Pro is the best hair straightener you're likely to find for under 20 bucks. The Best Curling Iron For Long HairWe’ve dubbed the Bio Ionic Long Barrel Styler the best curling iron for (wait for it) long hair.