RDY ‘Black Solar Yellow’ combines sustainable materials with a weather-resistant build. The performance runner makes use of a sock-like black knit upper, made with 50% recycled content and lined in warm yet lightweight insulation. Atop the stabilizing heel counter, ‘ULTRABOOST’ is embossed in neon yellow lettering. The sneaker is mounted on a full-length Boost midsole, supported by a Continental Rubber outsole and adidas’ updated Torsion system, dubbed Linear Energy Push. | adidas UltraBoost 22 Cold .