The Strata Pro Air Jersey 3. 0 uses perforated fabric across the body to keep air moving when the temperature climbs. Recycled Italian yarns make up the main body, sleeves, and side panels, each blended with a different ratio of elastane so the stretch and airflow shift by zone rather than relying on one uniform fabric. A seamless front hem and low-profile collar keep the fit close without adding bulk under a jersey pocket load. What Our Gearhead(R) Experts Are Saying:"Midday in August is when this jersey earns its keep. The perforated panels move enough air that I stop noticing the heat somewhere around the second hour, instead of counting down to the next climb in shade."