Published by at 07/08/2026 The Allbirds Natural Run Tank in size M is a lightweight and textured activewear top designed for women who prioritize comfort during activities like gym workouts, walking, or running. Made from a blend of polyester, lyocell, and wool, this sleeveless tank features a geometric pattern in black, making it versatile for various occasions. The racerback design and scoop neckline provide support and breathability, while the pullover closure adds ease and convenience. Perfect for the seasons of summer, fall, and spring, this tank is a great addition to any activewear collection. Smoke-free home.