Cleanroom Hood and Face Mask Selection Guide
Hoods and face masks control the contamination released from the operator’s head and respiratory system — the two most active particle sources in any cleanroom. Selecting the right combination for your grade and gowning sequence.
Cleanroom Hood Types — Bouffant, Standard, and Integrated
| Hood Type | Coverage | Particle Control | Best Grade | Key Feature |
|---|---|---|---|---|
| Full Bouffant Hood | Full head, neck, shoulders | Maximum — all hair and skin contained | Grade A/B | Elastic face opening; sterile option available |
| Standard Cleanroom Hood | Head and neck | Good — hair and scalp covered | Grade C/D | Worn with separate face mask; autoclavable |
| Integrated Hood (Coverall) | Head, neck, integrated with coverall | Maximum — no hood-coverall gap | Grade A/B | Eliminates neck interface gap entirely |
Selection logic: Grade A/B → full bouffant or integrated hood, sterile. Grade C → standard cleanroom hood, autoclavable. Grade D → standard hood or bouffant cap. The hood must overlap the coverall collar to eliminate the neck gap — regardless of hood type.
Cleanroom Face Masks — Sterile vs Non-Sterile
Face masks capture respiratory particles and droplets. In Grade A/B aseptic areas, masks are mandatory and must be sterile. Selection criteria: filtration efficiency, breathability, and compatibility with goggles (the mask must not fog goggles).
Hood and Mask by Cleanroom Grade
| Grade | Hood Type | Mask Type | Sterilization |
|---|---|---|---|
| Grade A/B | Full bouffant or integrated, sterile | Sterile face mask, mandatory | Gamma or autoclave |
| Grade C | Standard cleanroom hood, autoclavable | Non-sterile mask, recommended | Autoclave |
| Grade D | Standard hood or bouffant cap | Mask based on risk assessment | Non-sterile acceptable |
Hood and Mask FAQ
Should I use an integrated hood or a separate hood?
Integrated hoods (attached to the coverall) eliminate the hood-coverall neck gap entirely — best for Grade A/B. Separate hoods offer more sizing flexibility — an operator can wear a size L coverall with a size M hood. For Grade C/D, separate hoods are acceptable and offer better sizing and replacement practicality.
Do I need sterile face masks for Grade C?
Sterile masks are not mandatory for Grade C. Non-sterile surgical-style cleanroom masks are sufficient. However, if your facility SOP or risk assessment requires sterile masks at Grade C, follow that requirement. The mask should always cover the nose and mouth completely with a secure fit.
How do I prevent goggles from fogging when wearing a mask?
Use masks with an adjustable nose bridge and pinch it securely. Position goggles over the mask edge (not under). Choose fog-resistant goggle models. Ensure the mask fits snugly to direct exhaled air downward rather than upward toward the goggles.
How often should cleanroom hoods be replaced?
Hoods follow the same inspection-based replacement cycle as coveralls. Inspect after each sterilization cycle. Retire when elastic at the face opening loses tension, fabric shows thinning or discoloration, or the maximum cycle life is reached. Disposable hoods are single-use.
Need Cleanroom Hoods and Face Masks?
MIDPOSI supplies autoclavable hoods, sterile bouffant hoods, and cleanroom face masks for GMP facilities.
