Material Guide: SMS, Microporous, Tyvek®, and More

Not all disposable coveralls are created equal—and the difference often comes down to material.

From comfort and breathability to chemical resistance and durability, the fabric used in your disposable protective clothing has a huge impact on both safety and usability.

This guide breaks down the most common materials used in disposable PPE—and how to pick the right one for the job.

SMS, Microporous film, Tyvek®, PE-coated, and PP spunbond are five of the most commonly used materials in disposable protective clothing. Each has different strengths—some are better for breathability, others for splash resistance or durability. Choosing the right fabric is key to safety, comfort, and cost-efficiency.

Common Disposable PPE Materials at a Glance

1. SMS (Spunbond–Meltblown–Spunbond)

What it is:
Triple-layered fabric combining two spunbond layers with a meltblown core.

Why it works:

• Great breathability
• Blocks dry particles (Type 5)
• Comfortable for long shifts
• Moderate liquid protection (Type 6)

Best used in:

• Dusty environments
• Woodworking, warehousing
• Non-toxic powder handling

💡 Some SMS suits also pass EN 1149 (antistatic) and EN 1073 (radioactive particle protection).

2. Microporous Film Laminate

What it is:
Polyethylene film laminated over nonwoven PP base.

Why it works:

• Resists light chemical splashes
• Higher liquid protection than SMS
• Often rated Type 4/5/6

Drawbacks:

• Less breathable than SMS
• Can feel warm or “plastic-like” in hot environments

Best used in:

• Cleaning with diluted chemicals
• Industrial painting
• Waste management
• Pesticide spraying (short duration)

3. Tyvek® (High-Density Polyethylene)

What it is:
Patented by DuPont™—a flash-spun high-density polyethylene material.

Why it works:

• Excellent barrier against particles + low liquid splashes
• Extremely low lint (cleanroom friendly)
• Tear-resistant and durable
• Lightweight and breathable

Best used in:

• Pharma cleanrooms
• Electronics manufacturing
• Infectious disease protection
• Asbestos removal
• Biohazard suits

🔒 Tyvek® suits are often Type 5/6 but can outperform cheaper Type 4 suits in dry hazardous environments.

4. PE-Coated Polypropylene (PP)

What it is:
Basic polypropylene base with polyethylene (PE) coating on one side.

Why it works:

• Economical splash resistance
• Smooth outer layer repels water-based liquids
• Not suitable for chemical handling

Best used in:

• Low-risk wet work
• Food processing
• Light-duty cleaning
• Visitors’ suits

⚠️ PE-coated suits don’t breathe well—workers may overheat in high-temp settings.

5. Laminated Composites (e.g., PE+PP or Multi-film layers)

What it is:
Multi-layer construction for added chemical resistance.

Why it works:

• Improved protection against aggressive chemicals
• Often rated Type 3 or 4
• High mechanical strength
• Often used in short-use chemical suits

Best used in:

• Tank cleaning
• Chemical transfer operations
• Spill cleanup
• High-pressure washing with chemicals

🔬 Always check chemical compatibility charts! Not all laminates resist every acid or solvent.

How to Choose the Right Material

Bonus: What to Avoid

• ❌ Don’t use SMS for acid splash—it won’t hold
• ❌ Don’t pick PE-coated suits in high heat—they trap body heat
• ❌ Don’t assume “Microporous” = chemical suit—check chemical chart
• ❌ Don’t re-use Tyvek® suits after heavy contamination

🚫 Repeated use of single-use suits degrades their barrier—especially after contact with solvents or oil.

Conclusion

The right material makes all the difference—for protection, comfort, and cost-efficiency.

Before choosing a disposable suit, always ask:

• What hazard are we facing?
• How long will the user wear it?
• What’s the temperature and physical demand of the task?

Need help picking between SMS, Microporous, or Tyvek®?
We’re here to help you match material with mission.

📩 Email: [email protected]
🌐 Website: www.workwearsolutions.net