adidas Outdoor Women's Terrex Swift Climachill Melange T-Shirt 100% Polyester Doubleknit Imported Hidden zipper to increase the ventilation on hot days or strenuous activities Athletic fit tee made with fabrics for your active lifestyle Climachill fibers contain tiny particles of titanium, which enhance the fabric's ability to conductively cool Treated with Fresh rite for long lasting anti-microbial and anti-odor Stretch fabric design for mobility and function