3MR520-03-32R01 / 520-03-32R01 ASSEMBLY BREATHING TUBE FOR BE12 Breathe Easy™ 12 Tycheml QC Head Cover The Breathe Easy™ 12 features a disposable, liquid repellent polycoated Tychem® QC hood. Combined with the breathing tube, Breathe Easy™ 12 weighs only half a pound. It also includes a wide visor and absorbent sweatband. The hood is available in two sizes. NIOSH approved.