Its Long-Sleeve Tee “feels handmade” to her. “It is tissue-thin, very soft, very sheer with delicate stitching,” she says. It’s made from bamboo lyocell that’s a close cousin of modal.

Long-sleeved T-shirts are an underrated wardrobe staple. As stylist and fashion designer Jordan Page of @veryadvanced points out, the humble long-sleeved tee can look “classier than short ...