Description : Compatible : Universal model , adjustable elasticity , suitable for different head shapes , curved back design , more suitable for the head WASHABLE : This durable headgear can be washed repeatedly without fraying , curling , , or other forms of degradation . COMFORTABLE : headgear straps made of high quality Mesh cloth , breathable and lightweight . The durable material has good breathablity , it &# 39 ; s comfotable when it touch your . Mask Headgear Strap . The upgraded sticker make the . long service life . Size Chart : 30x28cm / 11 . 81x11 . 02inch Package Includes : 1 Piece Mask Headgear Strap Note : 1 . Please allow slightly error due to manual measurement . 2 . Due to between different monitors , the picture may not reflect the actual the item . 3 shopping !