Y-3 brings its sleek and stylish aesthetic to the Ultraboost 21. In all-black, it features uppers made from Primeknit textile and a luxe leather lining to ensure a premium fit. A boost™ midsole and Continental™ rubber outsole work together to provide cushioning and stability. - Primeknit Uppers - Leather Lining - boost™ Cushioning - Continental™ Rubber Outsole - Style Code: GZ9133
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