Things that benefit from a little melting: snow, a massage candle, the Wicked Witch of the West. Things we are 99.8 percent positive you do not want to melt: your hair [1] — you, uh, kind of want that solid. That is, unless you're talking about the latest low-maintenance hair colour trend [2] you're about to see everywhere called "root melt" highlights.

The technique is similar in theory to "drenched" colour [3] and "shadow roots [4]," in that your hair at the crown of the head is the main event, only it has a slightly softer effect. "This look erases the line of demarcation for a deep rooted look [5]," Karissa Schaudt [6], colourist at Maxine Salon in Chicago, told POPSUGAR. "The result has a softer root and grow-out than traditional highlights [7]. It's great for someone wanting dimension with minimal maintenance."

Why the recent surge [8] in the low-key look? Four words: it's easy as hell. To get the look, book a full highlight with your colourist. "After foiling, your colourist will paint two to three inches from your root with a tone one to two levels darker than your natural hair colour," she said, adding that your level of upkeep post-appointment is up to you. "How low of maintenance it is really depends on how dark you choose to shadow. The touch-ups can be every three to four months."

If you're looking for inspiration of the sweltering yet simple "root melt" highlights trend, keep scrolling. We do hope you're ready — because this one is coming in hot.