LIGHTWEIGHT, 4-WAY STRETCH MOUNTAIN BIKE SHORTS WITH AIRFLOW ZONES. The ultimate in speed and performance, Flexair Shorts are incredibly lightweight and comfortable. Constructed using 4-way stretch fabric, they rapidly wick perspiration and flex to give you a feeling of freedom unlike any mountain bike short you’ve ever worn. Strategically placed laser-cut perforations increase comfort further by providing exceptional breathability, while the DWR finish sheds moisture, dirt, and debris as you ride.If you’re looking for reliable, all-day riding comfort, look no further than a pair of Flexair mountain bike shorts.