Remember back in 2014 when Justin Bieber and Kendall Jenner appeared in those ubiquitous Calvin Klein underwear campaigns? The most memorable thing about those photos—besides perhaps their obvious nods to the fashion label’s ‘90s ads with Marky Mark (AKA actor Mark Wahlberg) and Kate Moss—were the logos on the elastic waistbands of their boxers and briefs.
Flash-forward to today and it feels like everyone from sportswear staples like Nike, Adidas, and Under Armour to boutique brands like Koral, Varley, LNDR, Ivy Park—even Calvin Klein–have incorporated the detailed trim into leggings, cropped sports bras, and workout shorts. One awesome side effect of this retro resurgence? You no longer have to ask the girl on the mat next to you where she got her leggings.