Use for e-commerce businesses, pharmaceutical distributors, and document-heavy shippers who need maximum protection during transit. These 9 x 12" Tyvek® envelopes combine durability with First Class mail compliance, making them ideal for time-sensitive shipments that demand puncture, tear, and moisture resistance without compromising on cost-efficiency.
Best For
How to Choose the Right Packaging
Specs at a Glance
| Material | 14 lb. Olefin (Tyvek®) |
| Dimensions | 9 x 12 inches |
| Closure Type | Self-Seal / Redi-Strip |
| Case Quantity | 100 envelopes per case |
| Recyclable | Yes |
Common Use Cases
- USPS First Class mail compliance and priority mailings Pharmaceutical and medical device shipping with moisture protection E-commerce returns and replacements requiring tamper evidence Financial documents and sensitive business correspondence Product samples and lightweight merchandise distribution
What You'll Receive
- 100 self-seal Tyvek® flat envelopes (9 x 12 inches) First Class printed border design
Shipping & Packaging
Frequently Bought Together
Bundle & Save 5%Frequently Asked Questions
Yes, Tyvek® material provides moisture protection compared to paper alternatives. This prevents water damage during rain or wet handling conditions, reducing returns and customer complaints, especially critical for e-commerce and pharmaceutical applications where product integrity directly impacts liability and reputation.
Self-seal closures eliminate tape purchasing and application labor. Employees spend less time sealing each mailer, improving packing throughput by up to 30%. The secure closure also reduces mailer tampering and product loss, directly improving your bottom line.
Yes, these envelopes feature printed First Class borders and meet all USPS dimensional and weight requirements for First Class Mail service. This ensures faster delivery times and regulatory compliance without additional markings or processing steps.
These envelopes are ten times stronger than standard paper mailers, offering puncture and tear resistance. This durability reduces damage claims during sorting, transport, and delivery, particularly important for fragile items, sensitive documents, or multi-leg distribution chains.
Technical Specifications
| Material | 14 lb. Olefin (Tyvek®) |
| Dimensions | 9 x 12 inches |
| Closure Type | Self-Seal / Redi-Strip |
| Case Quantity | 100 envelopes per case |
| Recyclable | Yes |
| Color | White/Green |
| Strength / Material | 14 lb. Olefin |
| Dimensions (Internal) | 9"" × 12"" (L × W × H) |
Product Downloads
Shipping Information
Outer Carton Dimensions
13.25" × 10.5" × 4.5" (L × W × D)
Unit of Measure
CASE
Qty Per Shipping Unit
100 PER CASE
LTL Freight Class
Class 78
Carrier Eligibility
UPS Ground & Freight Eligible
TRUST & RELIABILITY
Product Support
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Buyer guides
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