Reusable Respirator Masks

Agenus Joins the 3D Printing Effort to Contain the Spread of COVID-19


PLA plastic filament for 3D printing


Adaptation of design by La Factoria 3D, Vigo, Spain


  1. Mask
  2. Soft foam gasket
  3. Filter cavity
  4. Filter cap
  5. Front cap
  6. Replacement filter tissue
  7. Straps & Buckles


How to Wear

  1. 1.Make sure there is a filter in the filter cavity before wearing
  2. 2.Put head through bottom strap first
  3. 3.Put head through top strap
  4. 4.Adjust straps length by holding buckle and pulling strap end


  1. 1.Pull front cap off
  2. 2.Remove and discard filter tissue
  3. 3.Push filter cap out by using your thumb
  4. 4.SANITIZE all plastic parts by either:
    • Generously spraying with >70% concentration alcohol
    • Washing with soap and clean hot water
    • Steaming at max 212ºF (100ºC)
      • Concentration 5% = 50k parts per million = 1:100 dilution sodium hypochlorite to water ratio
      • Rinse well with abundant clean water

Assembling for Use

  1. Dry mask before applying filter
  2. Push in filter cap with your thumbs until it clips in

  3. FILTER Prep
    • Use provided filter or create your own by cutting two or three 2”x2” squares of tissue. Stack tissue squares to make 1 filter
    • Put filter tissue into filter cavity
  4. Snap-on front cap


    Store dry in closed package, such as zip-lock plastic bags

DISCLAIMER: This mask is experimental in nature and its safety and efficacy for use by humans has not been tested. PRIOR TO USING THIS MASK, YOU ARE STRONGLY ENCOURAGED TO MAKE EVERY EFFORT TO USE A N95 OR EQUIVALENT MASK. Agenus is providing this mask without any, and hereby expressly disclaims any, expressed or implied warranty of merchantability or fitness for a particular purpose, including with respect to prevention of the transmission of any virus or disease. The design, testing and manufacture of this mask have not been performed in accordance with or pursuant to any FDA, OSHA, or NIOSH guidelines, regulations or standards. EACH USER OF THIS MASK HEREBY EXPRESSLY RELEASES AGENUS INC. AND ITS AFFILIATES FROM ANY AND ALL LIABILITIES, KNOWN OR UNKNOWN, OF ANY NATURE WHATSOEVER ARISING OUT OF USE OF THIS MASK.