The Seirus Men's Heatwave Reversible Full Length Bottoms provide an amazing warming technology. These bottoms are engineered with Max Wick for increased breathability in areas where you run hot and, Polygiene antimicrobial mesh in the highest vent areas to provide more protection to your legs. They feature reflective hits to be visible while you are running or walking outdoors. The Seirus Men's Heatwave Reversible Full Length Bottoms provide the protection and warmth you need every day.