The 29-year-old pop star recently shared an Earth Day selfie clad in Nike leggings, Hunter rain boots, a New York Yankees cap, a smattering of necklaces — and a truly confounding crop top that instantly caught the eye of “Who? Weekly” podcasters Bobby Finger and Lindsey Weber.

After dedicating a full segment of their April 28 episode to Ora’s “mystery shirt,” Finger and Weber — who referred to the unusual garment as a “crop top boob cover” and a “long-sleeved sweater shirt,” respectively — asked their Twitter followers to take a stab at describing the look.

One person dubbed it a “bolerokini,” while another preferred the term “tit hammock.” Others suggested it might be a “long-sleeved bikini top” or a “boob harness,” with nobody seeming to reach a consensus.

Page Six Style has reached out to Are You Am I, the brand behind Ora’s curious crop top, for more details.