The adidas ULTIMATE men's running leggings are designed for high-intensity cold weather training. Thanks to a sophisticated combination of materials, they offer an optimal ratio of warmth and breathability. COLD.RDY insulation technology keeps the cold at bay, even if it's freezing outside. Soft brushed material at the top of the legs keeps your thigh muscles warm and ready to perform. Lightweight material in the calf area allows air to flow freely. You can safely store your phone and other essentials in the side pockets.