If you are making facemasks to donate for hospital use you might want to check with who you are donating to as to what type of ties/elastic to use. It seems elastic breaks down in the autoclave so they are requesting cloth ties. Some suggestions are ribbon or 1 in wide strips of a T-shirt. The ties also offer a better fit. The above tutorial shows how to use aluminum for the bridge of the nose but I noticed SmartNeedle.com has bridge of the nose inserts...no idea how long it takes to get them but there is a concern about a second wave of this virus in the fall of this year.