Very stable rubber dog mask made of 3 mm thick rubber. Applied closely, the dog mask sits immovable.
With 4 locks escape proof lockable, if the option was selected lockable.
Size uni corresponds:
Head circumference in forehead height from 52 - 62cm.
If you have a smaller size as 52 or bigger size as 62, you need to choose the option "made to measure".
How do I take my measurements corectly?