The adidas Yeezy Boost 350 V2 CMPCT Infants 'Slate Onyx' utilizes an engineered 3D knit upper, composed of 50% recycled content and featuring a blend of black and dark grey yarns. The sock-like build is secured with no-tie elastic laces, allowing for easy on-and-off wear. Responsive cushioning is provided by adidas' full-length Boost midsole, wrapped in a ribbed Thermoplastic Polyurethane cage and exposed through cut-outs in the grippy rubber outsole.