The RS-X 'Trophy - Steel Grey' is part of a special collection by Puma that pays homage to their revolutionary Running System technology, which was first released in 1987. This sneaker showcases a throwback design, incorporating a blend of mesh, leather, and nubuck materials. The color scheme features a range of white and grey tones, complemented by striking black accents on the eyelets, toe, and midsole. This combination of retro aesthetics and modern details makes the RS-X 'Trophy - Steel Grey' a versatile option for any sneaker enthusiast.