When theadidas 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 adidas running shoes are designed for cold conditions, with COLD.RDY to keep feet warm. BOOST midsole cushioning is paired with a Linear Energy Push system for a stable and responsive run. The Continental Wintergrip Rubber outsole provides extraordinary traction on slippery streets.Regular fit.