1017 ALYX 9SM is a boundary-pushing luxury streetwear brand founded in 2015 by Matthew Williams. Originally based in New York City and now headquartered in Italy, the brand seamlessly blends high-quality materials, subversive culture, and modern craftsmanship. Known for its technical innovation and emotional resonance, 1017 ALYX 9SM creates collections that merge street culture aesthetics with practical garment construction. The brand's signature elements include the iconic rollercoaster buckle inspired by Six Flags amusement park, industrial statement accessories, and advanced technical fabrics. Drawing inspiration from California and NYC skate, punk, and club subcultures from Williams' youth, the brand started as womenswear before expanding to menswear in 2017. With notable collaborations with Dior, Nike, Moncler, and Mackintosh, 1017 ALYX 9SM has established itself as a cult favorite among celebrities and fashion enthusiasts, offering an 'aggressively elegant' aesthetic that combines utility with luxury.