Stray Rats and New Balance teamed up for a New Balance 991 influenced by vintage robots and MechWarrior, a sci-fi video game franchise that started in the late 1980s. The New Balance 991 Stray Rats Black features a muted black suede upper with tonal grey suede overlays and a light purple New Balance logo. At the toe wrap, an embroidered Stray Rats logo adds a custom feel. From there, a black and purple sole completes the design. The New Balance 991 Stray Rats Black released in December of 2021 and retailed for $250.