The SEASUM Leggings Went Viral for Doing One Thing to One Part of You

In November 2020 a pair of leggings took over TikTok. Not a brand campaign, not a celebrity line, but a specific honeycomb-textured legging from a seller called SEASUM, propelled by thousands of people filming themselves turning around slowly in a mirror.

The Mechanism

The construction gathers fabric along the centre seam so that the material pulls inward and the two halves of the wearer are defined separately, with a textured weave and a dip at the lower back that reads, in Refinery29’s description, like a pulled-up thong. It is engineering applied to a very specific silhouette goal, and it works well enough that the internet lost its mind about it for roughly four months.

The Cultural Moment Was Real

The hashtag passed 630 million views. Stephen Colbert covered the phenomenon on The Late Show as part of a reaction compilation, which means a late-night host on American network television spent airtime discussing the structural properties of a $20 legging.

Lizzo tried them on TikTok for her audience of more than twelve million and delivered the review that has followed the product ever since. Four words: they make my booty stiff. We have read a great deal of product criticism and rarely encountered anything so economical.

The Price Was the Accelerant

Refinery29 pegged them around twenty-six dollars during the viral peak in January 2021, and that number explains the whole phenomenon better than the design does. A twenty-something-dollar impulse buy sits below the threshold where people research, compare or think. You watch a fifteen-second video, you tap once, and the leggings arrive on Thursday. Had these launched at ninety dollars, the videos would have been just as compelling and the sales curve would have looked nothing alike.

The Review Count Situation

Press coverage from the peak routinely cited sixty to eighty-four thousand reviews. The specific listing linked here shows 3.7 stars across 1,499 ratings, and the gap is not a contradiction. SEASUM sells this style across a large number of separate listings by colour and size, and the platform splits review pools between them. We are quoting the number we can actually see rather than the number that reads better.

The Failure Mode

Reported honestly, because 3.7 stars is not 4.8 and the reason matters. Coverage from the viral period described the rear seams splitting or stretching until holes appeared. Given the entire design premise involves fabric being pulled taut across the exact area under discussion, this is less a manufacturing surprise than a physics inevitability. Consider your squat routine before purchase.

The Verdict

They are cheap, they do precisely what the videos claim, and they have a durability question that the videos never mention. That combination is the most 2020 thing imaginable, and the fact that they are still listed and still selling five years after the moment passed suggests plenty of buyers decided the trade was fine. Check the listing for sizing, order the size up that half the internet recommends, and do not wear them somewhere you cannot leave quickly.