●Ultra Soft Fabric: The athletic base layer is made of polyester-blend spandex fabric. It delivers an amazing hand feel soft, lightweight and breathable. The 4-way stretch fabric allows you to enjoy outdoor activities without feeling restrictive ●Moisture Wicking & Breathable: MIER thermal shirts feature unique engineered ventilation that wicks away sweat as you work out, preventing you from feeling cold due to build-up of sweat on your skin ●Mock Neck: Unlike the standard low-cut round neck design, the mock neck design protects your neck from the cold and helps maintain your body temperature. Raglan sleeves and flat seams offer a greater range of motion ●Comfortable Fit: Baselayers offer a snug thermal fit with a lightweight material that keeps you at the perfect temperature no matter where you work out ●Made For: This long-sleeve performance tee is ideal for boxing, spin class, cardio sessions, gym, training, walking, jogging, workouts, everyday wear and more