Secura™ Skin Protectant, 4 oz. Tube, 1 Case of 12 Locator Aids Knee High (Closed Toe) * Medium The NasalFit Deluxe Knee High (Closed Toe) * Classic Black * 20 30 mmHg * Large * Ankle Circumerence 9 1 2 10 1 2 * Calf Circumference 14 18 1 2 * * Attractive ribbed design with 3 D knit structure * Easy to wear with a comfortable band that keeps socks up without binding * Flat toes seams and a roomy toe section * Reinforced heels for a longer lasting durable product * Anti bacterial additive reduces unpleasant sock odor * Special Moisture Transport System with soft micro and multi fiber yarns in the sole keeps feet dryer * Latex Free * Color: classic black Accepted by leading authorities as a simple and accurate method for discovering congenital color blindness and red green blindness each in two forms complete and incomplete * Includes four special plates for tests to determine the kind and degree of defect in color vision * Makes use of the peculiarity that in red green blindness blue and yellow appear remarkably bright compared with red and green * Color plates encased in specially designed album type books for ease of handling * Detailed instructions included Propylene glycol moisturizes skin Non greasy