NIKE Dri-Fit Tech Running Tights Dri-Fit polyester/ Elastane mix - for a stretchy, breathable fit Zoned venting - Strategically placed mesh for increased ventilation in key areas keeping Reflectivity - ensures good visibility at night to keep you safe and seen! Zip Pocket - a rear zip pocket is ideal for storing small valuables Zippered Legs - for ease of entry when putting the garment on.