adidas Consortium taps French retailer, The Next Door, for an elegant update to the A.R. Trainer. The adidas Consortium x The Next Door A.R. Trainer is inspired by the Festival d'Avignon, the world-renowned performing arts event. Built with a textile upper and leather and nubuck overlays, the adidas Consortium x The Next Door A.R Trainer is a premium take on a silhouette that blends between street and luxury.