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. 2020 Nov 24;6(1):19–37. doi: 10.1007/s40964-020-00159-x

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© Springer Nature Switzerland AG 2020

This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.

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Fig. 3 — Face mask and support parts made by SLS/PA12. a Stopgap surgical face mask [38] b Ear saver designed by tech4primary user from NIH 3D Print Exchange [81]. c Face fitter designed by Bellus3D [82]