This is a collection of files for behind-the-head surgical mask extenders

Find other files here: https://www.thingiverse.com/groups/hackthepandemic

Register resources with MatterHackers here: https://www.matterhackers.com/covid-19

Files for laser cutting

This one looks fast and cheap to run on a laser cutter. PDF and DXF files are available: Thingiverse | Mirror

This is converted from a FDM-optimized design. PDF and DXF files are available: West Virginia University | Mirror

Files for FDM 3D printing

This one is described as being approved for use in a clinical setting by the NHS. STL files are available: Thingiverse | Mirror