This smart flat iron allows you to plug in personal info like hair length and texture to automatically calculate the perfect styling temperature for your hair. “Far too many times, people use a hotter setting than they actually need,” our Lab pros say, but with nine temperature settings, this iron has the perfect fit for everyone, meaning you won’t scorch even super fine hair. It nabbed top scores for making hair noticeably shiny, with testers noting it “glided effortlessly” through strands without pulling, tugging or creases for a style that “lasted all day long.” Porsche says, “I love T3 because if I am doing a silk press, I know I am getting super straight and shiny results.” The iron remembers your settings but also offers instructions for re-touches and manual setup, plus 60-minute auto shut-off for peace of mind.
• Plate size: 1-inch
• Temperature settings: Adjustable up to 410ºF
• Auto shut-off: 60 minutes
Revlon’s super long, 1-inch-wide tool gave lasting straightness to even the longest, thickest hair. It had the widest temp range (180°F to 455°F) in our tests and at 4.9 inches, the longest plate length we tested (“but not too long,” said testers!) which aided in “making the process quicker,” a pro noted. It took around a minute to reach 94% of its claimed temperature, and it earned the top score for maintaining hair straightness in our technical test, though the lowest score for keeping hair straight, shiny and frizz-free all day long, so make sure you use an anti-frizz serum!
• Plate size: 1-inch
• Temperature settings: Adjustable up to 455ºF
• Auto shut-off: 60 minutes
