The 3Mâ„¢ Versafloâ„¢ Breathing Tube BT-30 features a self-adjusting length for improved fit and reduces risk of catching or snagging. A breathing tube connecting the air source with the headtop is required to ensure that clean air reaches the headtop reliably and with unrestricted airflow. The breathing tubes offered are compatible with all 3Mâ„¢ Versafloâ„¢ Headtops and Air Delivery Units. QRS (Quick Release Swivel) breathing tubes allow fast and easy connection. A special flame-resistant sleeve lengthens the life of the tube and protects it from flying sparks. A disposable breathing tube cover is availabe to help cleaning and decontamination operations.