If Sarah J. Maas’s gloriously chaotic “fairy smut” has ever left you feeling a little too seen, or perhaps a little too damp, there’s now an underwear brand ready to catch every last drop of your emotional and physical overwhelm. Knix, the beloved leak-proof underwear company, has teamed up with Maas for a spicy new collection inspired by her blockbuster fantasy-romance series “A Court of Thorns and Roses,” or ACOTAR for those of us who have lost entire weekends to its pages. The collaboration is exactly as cheeky as it sounds. Knix’s chief marketing officer, Cynthia Leo, embraced the saucy premise with a perfectly timed pun, saying, “We make leak-proof underwear, and the books are a little saucy, so we wanted to be there for all of your wettest moments.” And because this is a brand that understands its audience, the line promises to absorb the equivalent of up to eleven super tampons, which is either deeply impressive or mildly terrifying depending on how you read that statistic. The underwear is marketed to handle period blood, sweat, pee, and all the other messy realities of being a human woman who also happens to enjoy reading about winged warriors with impossibly sculpted chests. It’s a reminder that fandom doesn’t have to be separate from real life; sometimes your favorite books and your laundry routine can finally collide in a beautiful, absorbent embrace.
The collection arrives at a fascinating moment in ACOTAR’s cultural reign. Maas’s series first debuted in 2015, and what began as a niche fantasy romance about a human girl named Feyre falling for a brooding, terrifyingly handsome faerie lord has exploded into a massive multimedia phenomenon. The franchise has inspired everything from cozy Sam’s Club throw blankets to jaw-dropping, custom-made ball gowns that cost seven hundred dollars. In other words, ACOTAR isn’t just a book series anymore; it’s a lifestyle, a personality trait, and for many, a full-on obsession that demands tangible merchandise. This new Knix collaboration is just the latest entry into that ever-expanding universe, but it’s uniquely personal because it’s literally meant to be worn close to your body. The collection features sets themed around the series’ fictional courts, with each design trying to capture the distinct vibe and aesthetic of Maas’s magical world. There are floral pairs for the Spring Court, which feels appropriately delicate and seductive, and for the Night Court, the series’ brooding, morally gray favorite, there are seductive lingerie pieces designed for what the marketing copy describes as “deep bonds and a little spice.” Even the Autumn and Summer Courts get their own inspired designs, so every reader can find something that matches their favorite corner of Prythian. There are also pieces featuring popular series catchphrases, including a t-shirt that simply says “darling” and another that winks at the fandom’s beloved “bat boyfriends” — the trio of winged male characters who have inspired endless thirst posts, fan art, and passionate discourse about who deserves the heroine most. It’s playful, it’s unapologetic, and it’s clearly made by people who understand exactly what the fandom wants.
What makes this collaboration feel a little more special than your average celebrity merchandise drop is how much care went into involving the people who actually love these books. Knix partnered with forty diehard ACOTAR fans to help design the collection, bringing in real readers who could speak to what the series means to them and what they’d actually want to wear. This wasn’t just a corporate focus group; it was an attempt to build the line from the ground up with authentic voices at the center. The brand also flew a group of influencers to New York for the launch, and one of the recurring themes in their early praise was how well the collection channeled Maas’s strong, complicated female characters. That’s an important distinction — ACOTAR is often dismissed as just smut, but at its heart, it’s a story about a woman discovering her own power, navigating trauma, and choosing herself even when it would be easier to settle. The Knix line tries to nod at that emotional depth while still staying true to the brand’s fun, body-positive, practical ethos. A major goal of the crossover, according to those involved, was to appeal both to long-time readers who have been with Feyre since the very beginning and to newcomers who might be just discovering the series through TikTok or word of mouth. The designs were deliberately kept universal enough that you don’t need to be a superfan to appreciate them, but the references are certainly there for those who know exactly where to look. It’s a fine line to walk, and the fact that Knix leaned on community input suggests a genuine attempt to get it right rather than just slapping logos on generic clothing.
Of course, to understand why anyone would want underwear inspired by what people teasingly call “fairy smut,” you have to understand the larger genre that Maas has come to define. ACOTAR belongs to what is now affectionately known as “romantasy,” a portmanteau of romance and fantasy that has taken the publishing world by storm. In these books, the fairy men are muscular, mythical, often morally ambiguous creatures who possess magic and immense power. They typically fall in love with a human girl, have a great deal of explicitly described sexual encounters, and, more often than not, end up turning the girl into a fairy herself so they can live happily ever after in an immortal, magical bubble. The wings and powers inherent to these characters allow for what can only be described as abstract sex — the kind of bedroom scenes that involve mind-reading, mid-air acrobatics, and occasionally enough raw emotion to cause literal destruction. It’s all very over-the-top, and that’s precisely why readers adore it. The books offer a safe space for fantasy, desire, and joy that many women don’t get to access in their daily lives. Maas has frequently defended these explicit romantic themes, pushing back against critics who dismiss the entire genre as unserious or embarrassing. She has spoken out on podcasts and in interviews to call out the tendency to use the word “smut” as a way to belittle her work, pointing to the misogyny underlying the assumption that stories about women’s pleasure and emotional fulfillment are somehow less valid than other forms of literature. “I find that there is a tendency for people to roll their eyes at things that bring joy. And bring women joy, especially. And it pisses me the fuck off constantly,” Maas said on the “Call Her Daddy” podcast with Alex Cooper. That quote has become something of a rallying cry for fans who are tired of being ashamed of what they love, and it sums up the cultural stakes of a project like this one. Buying ACOTAR-inspired underwear isn’t just about getting a cute new garment; it’s about claiming your joy unapologetically, even if the world wants to giggle at you for it.
As with any high-profile fandom collaboration, not everyone is cheering. The new Knix line has generated mixed reactions from the ACOTAR fan community, with some enthusiastic readers expressing disappointment that the collection doesn’t feel magical or whimsical enough. On social media, a fair number of comments have noted that the designs look a little too basic, too safe, too similar to something you could find in any department store. One user put it bluntly: “We need whimsical, magical, royal. These garments could have been in the collection of any department store. I don’t see ACOTAR in any of this.” That kind of criticism makes sense when you consider the source material — Maas’s world is dripping with opulent gowns, glowing moonlit palaces, and intricate magic systems, so fans naturally expect merchandise to reflect that richness. A plain t-shirt that says “darling” feels like a distant echo of the epic romance they experienced in their minds. Yet for every disappointed comment, there’s another person who sees the collection as a practical, brilliantly timed release. The newest ACOTAR book is on the horizon, and readers know all too well that the emotional rollercoaster of spending hundreds of pages with these characters can do things to the human body. One Instagrammer captured the mood perfectly: “Gorgeous AND can stand the test of watery bowels?? Sign me up.” That kind of unhinged, self-deprecating humor is a core part of online fandom culture, and it points to the real appeal of this collaboration. It’s not trying to be high fashion or even particularly subtle; it’s trying to be useful, fun, and a little bit dirty in a way that feels personal. Whether or not the line succeeds in pleasing every fan, the conversation itself is exactly the kind of engagement brands dream of. It’s talked about, argued over, screenshotted, and shared across platforms, all of which keeps both Knix and ACOTAR firmly in the spotlight.
At the end of the day, this Knix and Sarah J. Maas collaboration is more than just another piece of branded merchandise. It’s a fascinating cultural moment that sits at the intersection of feminist romance fandom, body-positive product design, and the enduring power of a story that makes people feel something so intensely that they want to wear it on their skin. Yes, it’s a little absurd that leak-proof underwear is being marketed with references to fairy courts and mid-air sex scenes. But that absurdity is exactly the point. The brand found a clever, honest way to acknowledge what these books do to their readers — they make us swoon, they make us cry, they make us feel so much that sometimes our bodies react physically. If that means needing a little extra protection, then why not buy underwear that has your back? The collection may not be perfect in the eyes of every diehard fan, and some might always prefer a seven-hundred-dollar gown to a pair of practical, absorbent panties. But for a great many readers, the appeal of being able to snuggle up with the newest book wearing your Night Court lingerie, fully prepared for whatever emotional and gastrointestinal upheaval awaits, is exactly the kind of joyful, unapologetic self-care that Maas herself has been championing. So whether you’re a longtime Romantasy devotee, a newcomer just dipping your toes into the world of winged bat boys, or simply someone who appreciates a good pun, this collaboration offers a little something for everyone. It gives us permission to laugh at ourselves, to embrace our so-called guilty pleasures, and to celebrate the fact that women’s joy — in all its messy, overflowing, eleven-super-tampons-worth-of-joy — deserves to be taken seriously.
