Protect ears: Made of soft flexible plastic, it relieves the pressure on your ears when wearing a mask. Relief pressure from your ear which hurts you when you wear mask Hold mask in place: It also aids those who have ill fitting masks or ears that can’t hold the elastic in place. Includes: 5x translucent white Mask ear-loop strap.  Adjustable size to fit everyone. ( Strap Size 130mm by 20mm ) Compatibility: Works with most face masks, such as N95, surgical, dust masks and more. Works best with masks with thin ear elastics. Do note: This can be used with the Singapore Govt issued mask. However, ease of usability depends on how much your mask has shrunk in the wash, size of your head/face as the the mask does not have elasticity in the ear loops.