This is the new River Plate 17/18 away football shirt by Adidas.
The new away kit will be used during he 2017–18 Argentine Primera División - Superliga Argentina, which is the 128th season of top-flight professional football in Argentina.
@Bowie I thought so too. It's very similar, but not the same. The Hamburg kit's pattern creates the effect of rows of diamonds, this one is a zig zag pattern.