Sterilization Wrap Face Mask - Packs of 6

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Product Overview

These masks are hand-sewn in the USA using a material called sterilization wrap. Sterilization wrap is a medical grade SMS nonwoven polypropylene fabric that has been tested by its manufacturer(s) to have a Bacterial Filtration Efficiency (BFE) of greater than 98% using two layers of material. We have double-layered our masks intentionally to align with these findings.  Masks will come in either blue, white, or a combination of both.

Due to the global shortage of N95 and surgical masks, masks made from sterilization wrap have been used by doctors in hospitals who are facing critical PPE shortages. A doctor at UF Health has stated that masks made from this material may be able to “block 99.9% of particulates, making the masks about 4% more effective at blocking particulate material than the N95 masks.” Now doctors across the globe are using this material for mask creation. The CDC recommends the use of “homemade masks” when no certified face masks are available. The mask design affects efficacy, and our Sterilization Wrap Mask has not been formally tested as of yet.  

Material used for creation of these masks is collected as clean post-industrial waste generated by the manufacturing of sterilization wrap. This could include trimmings, off-colored batches, or QC fails. The material is aggregated in a warehouse and baled, and shipped to be upcycled into masks. The baling of the material may cause the fabric to be wrinkled. The material is unused, clean and equally as effective as new sterilization wrap. It can be considered an upcycled product that would have otherwise been sent to a plastics recycler.

The Circular Blu team has been upcycling and recycling sterilization wrap into various products for nearly a decade and have been making masks from it since late in February 2020.


- These masks are not intended to be used as a replacement for any regulated medical device and have not been cleared by the FDA. 

- These masks should not be considered as a comparable substitute for medical equipment.

- These masks are not NIOSH approved.

- Circular Blu does not make any claims as to the performance of these masks and urges customers to do their own research on the topic in order to make an informed decision.

Related Reading Material:

Article Containing Doctor at University of Florida Health's Claims on Sterilization Wrap Masks

"I think This Idea Could Save Hundreds of Thousands of Lives": UF Doctor Creates New, Effective Mask From Hospital Materials

Example of Another Doctor Describing How To Make Homemade Sterilization Wrap Masks

Sterilization Wrap Material Specifications From Manufacturer Including BFE Testing

Providence Health's Sterilization Wrap Design Instructions

Lehigh Valley Health Network is doing its part by taking an innovative approach to extend the use of N-95 respirator masks

Community members launched a coordinated sewing effort to produce surgical masks for Cayuga Medical Center in Ithaca using sterilization wrap

***The safety and efficacy of facemasks using the materials and processes described here have not been formally evaluated. By accessing this information, you agree to hold harmless the authors and maintainers of this site for the acquisition or transmission of contagion associated with its use. Improvised masks should not be considered a substitute for commercial personal protective equipment (PPE).