Heavy Rubber Eye Mask with Detachable Flaps - also as Lockable

This mask made of 3 mm thick black rubber is absolutely non-opaque - unless you remove the covers.

The covers are attached to the eye mask with two snaps. At the back of the head the mask has an adjustable buckle closure.

So that the mask can not be taken off, the buckle can be optionally equipped with an eyelet to close, and secured with a lock.