Polyester, Silky-soft, Stretchy, Lightweight, Breathable And Comfortable. MOISTURE WICKING: Breathable and lightweight QUICK DRY fabric pulls moisture away from the skin, which keeps you cool and dry. TAG-FREE: Flat lock seamlines and tag-free neck reduce chafing and increase comfort. STRETCHY: 4-Way Stretch Fabric allows a wide range of movements. GREAT FOR: Hiking, Camping, Vacation, Yoga, Running, Training, Jogging, Fitness, Sports, Athletic. Comfortable for both indoor and outdoor wears in summer, spring or fall.