If you manage a long-term care home, a dental clinic, or a community health centre, isolation gowns are one of those items you need to get right—but the market makes it surprisingly easy to get wrong. I've seen homes order Level 4 gowns for routine patient care (overpaying dramatically), and I've seen clinics buy lightweight non-rated coveralls thinking they were getting the same protection.
The AAMI (Association for the Advancement of Medical Instrumentation) PB70 standard classifies isolation gowns into four levels based on liquid barrier performance. Understanding these levels is the key to buying the right gown for your setting—and not a dime more.
What does each AAMI PB70 level rating actually mean?
Every medical isolation gown sold in Canada and the US is tested to AAMI PB70, which measures how well the gown material resists liquid penetration under increasing pressure. The level you need depends on the procedures performed and the splash risk involved.
| Level | Barrier Performance | Key Test | Typical Use |
|---|---|---|---|
| Level 1 | Minimal barrier | Water penetration (AATCC 42) ≤ 4.5g | Basic care, standard isolation, visitor gowns |
| Level 2 | Low barrier | Impact penetration (AATCC 42) ≤ 1.0g | Blood draw, suturing, ICU, ER |
| Level 3 | Moderate barrier | Hydrostatic pressure (AATCC 127) ≥ 49 cm | Arterial blood draws, ER trauma, intubation |
| Level 4 | High barrier (virus-proof) | Viral penetration (ASTM F1671) — Pass | Surgery, high-infection-risk procedures |
When is Level 1 the right choice?
Level 1 gowns provide minimal barrier protection—they're tested for water penetration resistance, not hydrostatic pressure. This sounds limiting, but for the vast majority of clinical interactions, Level 1 is appropriate: routine patient exams, standard isolation precautions, administrative tasks in clinical areas, and visitor gowns.
For a long-term care home where the primary risk is contact transmission during daily care (bathing, dressing, mobility assistance), Level 1 gowns are clinically appropriate and significantly more comfortable for staff who wear them for extended periods.
Our CliniEco Level 1 isolation gowns are AAMI PB70-rated, made from non-woven polypropylene, and designed for single-use. They're also available in a PLA biodegradable version for facilities with sustainability commitments.
When do Level 2 and Level 3 gowns make sense?
Level 2 gowns add impact penetration resistance, making them suitable for procedures where fluid splash is possible—blood draws, suturing, wound irrigation. Most emergency departments and ICUs stock Level 2 as their standard gown.
Level 3 gowns add hydrostatic pressure resistance (≥49 cm of water). This is the level you need for arterial blood draws, ER trauma response, and intubation procedures. The material is heavier and less breathable, but the barrier protection is substantially higher.
Is Level 4 only for surgical settings?
Level 4 gowns must pass the ASTM F1671 viral penetration test—essentially, they're virus-proof. These are surgical gowns, designed for operating rooms and high-risk infection scenarios. They cost significantly more, and for most facilities outside of surgical settings, they're unnecessary.
A note from experience: I've seen facilities default to Level 4 "because it's the best." The problem is that Level 4 gowns are heavier, hotter, and more expensive—which means staff are more likely to skip wearing them when they should. The right gown is the one your staff will actually wear consistently.
How do gown levels compare on cost for Ontario facilities?
| Product | Price per Box | Gowns per Box | Cost per Gown |
|---|---|---|---|
| CliniEco Level 1 Isolation Gown | $24.99 | 50 | $0.50 |
| CliniEco PLA Biodegradable Level 1 Gown | $28.99 | 50 | $0.58 |
| Typical distributor Level 3-equivalent | $40-$65 | 50 | $0.80-$1.30 |
For a 100-bed LTC home using roughly 300 gowns per day across all shifts, the annual cost at $0.50 per gown is approximately $54,750. At typical distributor pricing of $0.80 per gown, that same home would spend $87,600. The difference—nearly $33,000 per year—goes straight to the bottom line.
What should you check before your next gown order?
- ✅ Confirm the AAMI PB70 level appropriate for your clinical setting (Level 1 for most LTC and routine care)
- ✅ Verify the product has AAMI PB70 certification documentation
- ✅ Check that the gown is the right size for your staff population (standard vs. extended fit)
- ✅ Consider cuff type: thumb-loop cuffs provide better sleeve security during procedures
- ✅ Factor in disposal costs, not just per-gown pricing
- ✅ If sustainability is a priority, evaluate biodegradable PLA options
What should you take away from this gown guide?
The isolation gown market has become a commodity—hundreds of suppliers, competing on price, with widely varying quality. The key to getting it right is not buying the cheapest or the most expensive, but matching the AAMI level to the actual clinical risk. For most LTC homes and outpatient clinics, Level 1 is the right answer. For acute care, Level 2 or 3 is appropriate. Level 4 should be reserved for surgical environments only.
At CliniEco Medical, we keep our gown line simple: Level 1 and Level 1 biodegradable, both AAMI PB70-rated, both stocked in our Toronto warehouse. If your facility needs a different level, we can help source the right product.
CliniEco Medical is an Ontario-owned distributor serving LTC homes, clinics, and healthcare facilities across Canada.
Need this for your facility? CliniEco Medical supplies CliniEco Medical Isolation Gown — SMMS 40gsm Level 2 Protection, 50-Pack to Canadian clinics, laboratories and long-term care homes. Open a wholesale account for institutional pricing.
Related Reading
Explore more guides in this category:
- PLA Isolation Gowns for Long-Term Care: Eco-Friendly Protection
- Isolation Gown Selection: Level 1 vs Level 2 Protection for Canadian Healthcare
- Isolation Gowns for Ontario LTC Homes: What Inspectors Look For in 2026
Also read: compare isolation gown standards (ASTM F2407 vs AAMI PB70) in our pillar guide.
Frequently asked questions
What does AAMI 1135:2014 mean, and is it AAMI Level 3?
AAMI PB70 sets four barrier levels for gowns and isolation apparel — Level 1 (minimal) through Level 4 (highest, for prolonged fluid exposure). The level is determined by standardised resistance tests, not by fabric weight. Match the level to the task: routine care needs Level 1–2; procedures with fluid or blood spray need Level 3; prolonged or high-volume fluid exposure needs Level 4.
0 comments