Y3 Boxing Trainers in Black / White. The adidas x Yohji Yamamoto collaboration presents another iteration of the popular Y-3 Boxing Trainers. This time around the upper gets a textileconstructionr to the front half of the shoe whist the rear half of the shoe is finished in a premium upper. Fabric three-stripes adorn the side panel whilst Y-3 branding can be found to the heel, tongue and sole unit. A popular luxury choice of footwear for the terraces.