This mask was modified from the design online at:

https://www.billingsclinic.com/foundation/3d-printed-surgical-mask/

That sight provides additional information on the development of the files and gives further credit to the original authors.

The modifications provide a few improvement I though needed when trying out the mask myself:

1. more sturdy/tolerant tie points
2. increased depth for better fit
3. increase in size of filter area to improve breath-ability

The outer shell of the mask is meant to be reused and there is an insert meant to secure filter medium. I will likely be using a HEPA product with a preshrunk cotton overlay. The filter medium may be changed as needed.

*The 3D printed mask information presented here is intended to assist the general public during the current global pandemic related to COVID-19 and the related nationwide shortage of personal protective equipment. Please be aware that this mask design is not intended to replace standard protective equipment such as N-95 masks or surgical masks when that equipment is available. The use of this mask has not been tested and has not been approved by federal or state authorities. I make no representations or guarantees regarding the safety, efficacy, or appropriate use of these masks in any particular situation. Use of this information for any purpose is at the maker’s and user’s own risk.