Here's Irina Shayk, who definitely wins the prize for NYC's most casual supermodel (RESPECT), going for a little morning walk in NYC while wearing flip flops, a sweatshirt and cut-off shorts, as well as carrying a glossy Hermès Crocodile Birkin. There is a small chance it might be alligator, but croc is more common for Hermès bags. We've never seen Irina with this bag before, so we're guessing this is a fairly recent acquisition.
This isn't Irina's only Birkin, of course. We saw her with a bright blue Birkin back in June. Irina doesn't have her own edition of "The Many Bags of..." just yet, but I suspect she's probably on Amanda's shortlist. In the meantime, you can check out more of Irina's best bags in "50+ Bags on the Arms of Our Favorite Supermodels."