I have purchase from other competitors. You customer service is 5 stars much better then other websites, but the quality of your material not 5 stars. Sorry just being honest.
I absolutely love the versatility of these. With the mandatory mask mandates I am able to use these and still breathe without a problem. I have asthma, PTSD, and a couple other medical issues that hinder my breathing when I feel closterphobic or when my anxiety is high. (I have never had anxiety until this mandatory mask mandate went into effect).