Disposable inserts. I just cut up those $1 masks and inset them in the pocket.

Easy to maintain and they replenished the supply two or three times so far at no cost.

The eye protection mucosal can be tricky... At 9 am this morning I get my eye injection and will ask Doctor for the latest info. Otherwise I use Home Depot goggles and tape the air vents. I ditch them every three days. Very inexpensive.