Allegro® 9920 Half Mask Supplied Air Respirator - Sold Individually

Item #9920

This comfortable half mask offers low pressure continuous flow protection with the same unique over the shoulder hose design and belt. It’s durable and easy to use and clean. The low-profile design allows it to fit under welding shields.


  • Durable silicone rubber maintains shape while in storage
  • Hypoallergenic and chemical/Ozone resistant
  • Comfortable even in extreme heat and cold environments 

Exhalation Valve:

  • Unique exhalation valve design.
  • Easily accessible for fast replacement and servicing
  • Large diameter for minimal breathing resistance 


  • Standard double strap keeps mask in place
  • Made of durable rubber 

Down Tube & Belt Assembly:

  • 90 Degree elbow allows it to be directed over the shoulder and out of the way
  • Corrugated material for flexibility
  • Lightweight material for greater comfort and less fatigue
  • OBAC quick-connect plug with wide diameter and minimal air restriction
  • Low profile nylon waist belt
  • Plastic clip to restrain airline hose from pulling on the facepiece 

NIOSH Approval:

  • Approval No. TC-19C-355  Use only Allegro approved airline hose.


The Allegro Supplied Air Respirator is a comfortable half mask that offers low pressure, continuous flow protection with the same unique “over the shoulder” hose design and belt as the full facepiece respirator. It’s durable and easy to use with OBAC quick connects. The low profile design allows it to fit under welding shields. The skirt is made from silicone, is easy to clean and it won’t lose its shape in storage. With the NIOSH approval TC-19C-355, you know you've made the right choice!

Do you order this product often and/or in large quantities? Check out our Large Order Program to save yourself time and money.

If this isn't what you're looking for, please check out the rest of our supplied air respirator category.
  • Manufacturer:

    Allegro Industries