Soft cotton/flannel. Front buckle closure allows easy self application. Flexible back stays. Discreet under clothing. Scott Certified Professional offers a wide range of quality products designed to help you stay active. Supports that help reduce pain and discomforts associated with injuries, accidents, arthritis, and repetitive stressors to tendons and muscles. Or use as a preventive reminder! Affordable, long-wearing firm yet comfortable support. Lightweight, go anywhere. Fiber content and wear instructions included as indicated. Fits chest circumference up to 44 inches.