Today is a big day, at least for two brands, Adidas and Allbirds, as it marks the release of the latest iteration of their low carbon emission shoes, the ADIZERO X ALLBIRDS 2.94 KG CO2E. Announced last year, the new shoes are an evolution of the FUTURECRAFT.FOOTPRINT and "seek to demonstrate that low-carbon running shoes can be delivered at scale", as Adidas explains.Other brands also have their low-carbon or even carbon-neutral running shoes – such as the Brooks Ghost 14 – but what makes the ADIZERO X ALLBIRDS 2.94 KG CO2E different is that it combines sustainability, performance and style. In fact, this new iteration is the lowest carbon performance shoe Adidas or Allbirds have ever created!I've been lucky enough to be sent a pair by Adidas and let me tell you, they look as sexy as they do in the pictures. A real beaut.