The SUMWOM long sleeve mock neck athletic open thumb black t-shirt is a fitted, performance-oriented top designed for workouts and casual wear, featuring moisture-wicking, stretchy fabric and functional thumbholes. Key Features and Description Material: The shirt is typically made from a lightweight, soft blend, commonly 90% Polyester and 10% Spandex, which offers a silky feeling against the skin. This composition provides a good degree of stretch and durability. Fit: It has a fitted or light compression fit, designed to hug the body for a flattering silhouette and to reduce drag during exercise. Functionality: Moisture-wicking & Quick-Dry: The fabric wicks sweat away from the body to keep you cool and dry during intense workouts. Thumbholes: Cuffs with thumbholes prevent the sleeves from sliding up during movement, help keep the hands warm in cooler weather, and provide extra coverage to the wrist. Mock Neck: The high-neck self collar provides added warmth and coverage, and can serve