3D Printed N95 Replacement Mask being made at Barrows Neurosurgical Institute

The Barrow Innovation Center was developed by neurosurgery residents to tackle the unmet and unknown needs of the health care field. With this pandemic, we’ve been tirelessly working on products to help curb the personal protective equipment (PPE) supply shortages.

Our N95 substitute is a 3D-printed and silicone cast mask that seals around the face. It uses a 3M P100 filter and can be worn with other existing PPE. ​

// Download Assembly Instructions

// Download Printer Files

Frequently Asked Questions

What kind of 3D printer is compatible?

These files can be downloaded and will work with any 3D printer. We use FDM printers in our laboratory.

What materials are needed?

The materials below are needed to produce the N95 replacement mask (manufacturer in parentheses):

  • PLA 3D Printing Filament (Hatchbox)
  • Dragon Skin 10 Very Fast Silicone (Smooth-On)
  • Sil-Poxy Silicon Rubber Adhesive (Smooth-On)
  • Ease Release 200 Silicone Mold Release (Mann Release Technologies)
  • Silc-Pig Silicone Colorant (Smooth-On)
  • Elastic Band (Any)
  • #212 O Ring (Any)
  • Gloop! PLA Adhesive (Gloop!)
  • Silicone Mold (Barrow)

What kind of filter is needed and where can I find them?

Our N95 replacement mask is compatible with 3M P100 filters. The filters are approved by the National Institute for Occupational Safety and Health and have an emergency use authorization from the United States Food and Drug Administration.

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