9x12 Tyvek First Class Mailing Envelopes - Tear & Moisture Resistant, Case of 100
$50.21
/ case of 100$0.50 per mailer
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Ships from the nearest of 5 US warehouses · freight calculated at checkout
30-day returns on stock items · Return policy
Inside dimensions
9" × 12"
Board / material
14 lb. Olefin
Color
White/Green
Freight class
Class 78
Specifications
| Inside dimensions | 9" × 12" (L × W) |
|---|---|
| Board / material | 14 lb. Olefin |
| Color | White/Green |
| Sold as | Case of 100 |
| Order in multiples of | 1 |
| Case weight | 2.84 lb |
| Outer carton (shipping) | 13.25 × 10.5 × 4.5 in |
| LTL freight class | Class 78 |
| GTIN | 50047614214701 |
| SKU | TYF0912FC |
About this item
SKU TYF0912FC — 9" × 12", 14 lb. Olefin, White/Green. Sold as a case of 100, shipped from US warehouses.
Premium 9x12 Tyvek First Class envelopes deliver 10x the tear resistance of paper mailers with built-in self-seal closure and First Class printed borders. Constructed from 14 lb. olefin material for puncture, tear, and moisture protection.
Common questions
Are these envelopes waterproof and how does that benefit my shipping operations?
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.
What makes the self-seal closure more cost-effective than tape-sealed alternatives?
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.
Are these compliant with USPS First Class mail standards?
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.
How much stronger is 14 lb. Tyvek® compared to kraft paper mailers?
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.
Order support
Questions on specs or freight?
Send the SKU, quantity, and delivery ZIP and we will confirm specs, availability, and freight before you order.