Louis Garneau - Oslo Airzone Cycling Tights HeatMaxx: Stretchability and thermoregulation The Airzone chamois is made with high-density perforated memory foam that eliminates chafing and provides comfort and breathability. It's treated to keep you healthy and clean. The HeatMaxx 4-way stretch fabric helps keep you warm in cold weather riding. The elastic waist with drawstring and ankle grippers keep the garment in place during activity. Features flatlock seams that help eliminate chafing and irritation. Reflective accents provide increased visibility.