Toppen 77 is available in sizes from a circumference of the head of 46 up to 59 cm. The size is measured as shown in the picture to the right, just above the ears. Toppen is lined on the inside with cotton and faced on the outside with nylon. The outside is therefore resistant to soiling but Toppen can be washed at 40°C.
For further information on Toppen 77 the brochure can be downloaded here.