The outer cover attaches to the inner mask via 4 pressure springs, offering the possibility of changing the cover to your liking
Washable / Reusable
The inside mask is machine washable up to 40 degrees. The removable cover is hand washable and should be submerged for 20-30 mins.
It consists of 2 layers - cotton and TNT - and has the addition of a removable cover. Not only do they protect, but they are also comfortable and easy to use.