Based on a recent study investigating airflow and particle dispersion from instrumentalists and vocalists, the preliminary results included the statement, "Masks, nylon bell coverings all reduced particle concentrations."

In addition to this, the study found that, "Concentrations were relatively higher for instruments that had straight

shapes from mouthpiece to bell."

We are pleased to offer this solution for 'belled' instruments of all sizes made from the same material as our gaiter masks!

Our standard bell covers come in one-ply. If you would like to reinforce the bell covers with 2 layers, we have found that it is simple and cost-effective to put one cover on top of the other. 

Another option for reinforcement is to place a cut-to-size piece of Merv 13 filtration material over the bell in addition to the cover(s). Rolls of Merv 13 can be found at most home improvement stores or on Amazon here.