Instagram snaps she posted on Friday.
“Let’s go! Miami nights 🖤” the “Kardashians” star, 42, captioned the post.
In the pics, Kardashian wears a black leather halter top with just two thin strips of leather across the back as she poses in her hotel room, pairing the crop top with a pair of low-rise leather trousers.
The Skims founder wore a super-long ponytail extension in her hair after recently debuting a short bob that drew comparisons to older sister Kourtney Kardashian’s cut.
She carried a vintage 1990s Chanel vanity case ($14,920) as a bag and let her outfit do the talking in terms of accessories, going jewelry-free except for one of her often-worn belly chains.
“You’re so gorgeous” younger sis Khloé Kardashian, 39, commented on the post, while celeb hairstylist Andrew Fitzsimmons wrote, “We did that 🔥🔥🔥”
“Your commitment to getting in the best shape of your life shows! Rock it, Kim! 🔥” a fan added, while another praised her “Toned arms/back game.”
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Others questioned her choice of a leather set during the summer heat, like one Instagram user who wrote, “the only person wearing leather in MIAMI in AUGUST lol.”
Aside from partying in South Beach, Kim also brought daughter North West, 10, and her basketball team to dinner at celebrity hotspot Katsuya last week after a big win, wearing a decidedly more casual set for the outing.
The Skkn by Kim founder wore an olive green crop top and matching leggings with green slides for their high-end dinner while North and friends sported their basketball uniforms.
Perhaps she’ll wear another leather look for her next cool mom outing.