When the adidas Ultraboost debuted in 2015, it set the standard for comfort and performance in a running shoe. Each new release raises the bar, and this one is no exception. These running shoes are built for cold-weather runs, featuring COLD.RDY to keep feet warm. The energy-returning BOOST midsole is reflective, so it shines bright from dusk to dawn. The Continental™ Wintergrip™ Rubber outsole ensures a secure grip on slick streets. MADE IN PART WITH RECYCLED MATERIALS Made with a series of recycled materials, this upper features at least 50% recycled content. This product represents just one of our solutions to help end plastic waste. INCREDIBLE ENERGY RETURN Hundreds of BOOST capsules fused together and designed for ultimate comfort and responsiveness.