This is the Manchester City 25/26 Away Men's Authentic Jersey, designed by Puma. 

Design: The jersey features an all-black design with metallic detailing, drawing inspiration from Manchester City's first known kit from 1884.

Sponsor: The front of the jersey prominently displays the "ETIHAD AIRWAYS" sponsor logo.

Symbolism: The 25/26 Away Kit pays tribute to the club's origins and early history, reimagining a classic design with modern performance features.