Breathing filtration system
The Breathing system on a Kull warrior
Production information
Manufacturer	Goa'uld
Designer	Anubis
Technical specifications
Function	Air filtration
Usage
Affiliation	Kull warriors

[Source]

A Breathing filtration system is an air filtration system created by Anubis and used by the Kull warriors. It is used by the Kull to survive without oxygen for nearly ten minutes and to have a higher degree of resistance to airborne toxins and sedatives. (SG1: "Evolution, Part 1")