3MR520-01-00R01 / 520-01-00R01 TUBE BREATHING ASSEMBLY EXTRA LONG Breathe Easy™ 10 Tychem® QC Hood Designed to provide clean breathing air in applications such as chemical handling, pesticides, nuclear applications, paint spraying and light industry. Tychem® QC hood provides clear peripheral vision and fits most head sizes and is completely disposable. Dual shroud and inner elastic faceseal. NIOSH approved.