When you think lingerie, cotton undies likely don’t come to mind. Enter Bella Hadid, Kendall Jenner and the like who’ve managed to legitimize cotton skivvies as both seductive underpinnings and a sound fashion choice, boldly embracing the underwear-as-outerwear trend through their street style and high-profile campaigns. The cool-girl look—quintessential Calvin Klein—reads offhandedly alluring and is open to interpretation (a bra poses as a crop top alongside sporty separates or peeks out from beneath a button-down). Here, we’ve culled six sexy (and comfortable) sets to add to your wardrobe now. It-girl style has never been so easy.