Serpenti exhibition in Seoul, June 2023 Known for his freckles and his platinum blond mullet, Felix has been described by
Teen Vogue as a "fashion star in the making", and has been noted as having an ethereal, He has expressed an interest in androgynous and gender neutral fashion, and in 2024,
British Vogue named him one of several male celebrities at the forefront of the "babygirl" aesthetic. He has cultivated an experimental image, embracing colour and accessories including bags, jewellery, glasses, and platform sneakers, and enjoys using make up, hairstyles, and other visual styling to enhance his outfits. In an interview he mentioned that growing up seeing creative and fashionable people express themselves via clothing inspired his own sense of style. On 31 August 2022, together with Hyunjin, Felix attended the
Tod's Seoul event at Loop Station Iksun. In June 2023, Felix attended the Bulgari Serpenti exhibition, "75 Years of Infinite Tales", in Seoul. In May 2024, Felix made his
Met Gala debut with
Stray Kids, for which he gained viral attention. Felix first attended
Paris Fashion Week on 5 March 2024, and six months later, made his
New York Fashion Week debut in September 2024, attending as a guest alongside bandmate
Lee Know. In November 2025, Felix and bandmate Bang Chan, an Australian native, participated in
Tourism Australia's campaign "Come and Say G'day Chapter 2" in South Korea. In March 2026, he and actress
Jun Ji-hyun were appointed as the honorary ambassadors for the 140th anniversary of
France–South Korea diplomatic relations.
Louis Vuitton ambassadorship On 29 April 2023, Felix attended
Louis Vuitton's Pre-Fall 2023 show in Seoul. It was at this event that the brand's creative director of womenswear,
Nicolas Ghesquière, met Felix and noted "his energy, his unique personality, and his audacious sense of style". Felix has since been described as a "muse" of Ghesquière. Felix later attended the 2024 Louis Vuitton cruise show in May 2023, and was dressed by the brand for Stray Kids' performance at
Lollapalooza Paris 2023. In August 2023, Felix was chosen as the house ambassador for
Louis Vuitton. By October it was estimated the partnership had delivered approximately $4.5 million in media impact value for the brand. Subsequently, Felix wore several items from the brand while performing on Stray Kids'
5-Star Dome Tour. In October 2023, he attended Louis Vuitton's Spring-Summer 2024 show at
Paris Fashion Week. In May 2024, he attended the Louis Vuitton cruise show 2025 in
Barcelona. A scheduling conflict meant Felix was unable to attend the Spring-Summer 2025 collection show in autumn 2024, but he worked with the brand on a variety of online promotional content for the show. In March 2025, Felix modelled items from the 'Soft Power' Spring-Summer 2025 collection for Louis Vuitton in
Vogue Korea. In May 2025, he attended the Louis Vuitton cruise show 2026 in
Avignon. On 3 July 2025, Louis Vuitton announced that Felix had collaborated with the brand on the Silver Lockit 2025 limited edition jewellery collection, from which each sale would contribute to
UNICEF. On 30 September 2025, Felix attended Louis Vuitton's Womenswear Spring-Summer 2026 collection show in Paris.
Runway model debut Felix made his runway debut at
Paris Fashion Week for Louis Vuitton Women's Fall-Winter 2024 Collection at
Cour Carrée on 5 March 2024, including leading the runway's finale together with actress and model
Jung Ho-yeon, who gave him advice on walking in heels.
Partnership with II Combined Felix has also frequently collaborated with South Korean luxury goods corporate group II Combined, and is a brand representative for several of its child companies, including eyewear brand
Gentle Monster, fragrance brand Tamburins, and headwear label ATiiSSU. In September 2025, Felix was unveiled as the star of Tamburins' campaign for their "Sunshine" perfume collection. Later the same month, Felix attended the opening of Gentle Monster's store in
Ginza.
Hera ambassadorship In August 2025, Felix was announced as a global ambassador for the luxury beauty brand
Hera, making him the first male ambassador for the brand. A brand representatived cited Felix's "unique aura and multifaceted charm" as central to their international consumer outreach. His first campaigns for the brand included the global campaign for the 'Reflection Skin Glow' cosmetics range, and the launch of a new lip colour inspired by Felix, 'Brownie Boy,' for Hera's Sensual Nude Gloss product line. making him the first K-pop idol to represent the brand. The brand announced plans for a variety of limited-edition products featuring Felix, initially in South Korea before expanding to overseas stores. Beginning in June 2025, Korean branches of Gong Cha introduced a "Felix Pick" menu, featuring a selection of his favourite bubble teas, and incorporated Felix's voice into self-service checkouts. In August 2025, Gong Cha released a limited-edition cup sleeve as part of the "Felix's Favourites' Experience" brand event.
Other endorsements and brand deals In 2021, together with bandmates and fellow DanceRacha members Lee Know and Hyunjin, Felix endorsed the Earthbeat sneaker for
Etro. Since August 2023, Felix has been Louis Vuitton's Global House Ambassador, anchoring fashion shows and seasonal campaigns. In February 2024, Felix modeled for Bulgari Parfum in a beauty pictorial for
Vogue Korea. Nacific, and OHTNYC. In 2025, Felix became a face of the smartphone
Samsung Galaxy S25 Edge, and an ambassador of
Spotify and
Naver collaborative campaign. In 2026,
Adidas appointed Felix to be its global icon and ambassador, and
Lotte Chilsung's
prebiotic soda Happiz chose him for the brand's first ambassador. ==Philanthropy==