For decades, celebs have been obsessing over Calvin Klein’s logo-emblazoned undies. Everyone from Kate Moss to Justin Bieber has worn the OG logo print, and not just in those famous magazine ads. I’m sure you’ve probably spotted a few A-listers—like Khloé Kardashian and Ciara—posing on Instagram in their Calvins, too.

Now, it’s time for us “normals” to stock up on the celebrity-approved undies. And get this: You won’t have to pay full price because a few designs are marked down at Amazon Prime Day for as low as $13.

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All you have to do to enjoy the savings is to log into your Prime Account. Not an Amazon Prime member? That’s OK. It’s not too late to sign up. Test out the free trial for 30 days. After that, it’s only $13 a month or $119 a year. And you can cancel at anytime.