Since their launch in 2001, the 991s have been synonymous with superlative quality. As the first 99X model of the 21st century, the original 991 set the standard for modern running shoe design. The Made in UK 991v2 represents a new pinnacle, bringing an evolutionary reinterpretation of this true icon. A streamlined take on the classic pig suede, mesh, and synthetic upper offers a sleeker overall profile while maintaining its familiar look. The most significant technological shift is the addition of full-length FuelCell cushioning. This update mirrors the evolved yet familiar approach of the upper, pairing the updated construction with the classic functionality of ABZORB SBS pods and ENCAP cushioning.