9.5 × 12" Envelopes

• Stays stuck through everything: The heavy-duty adhesive back bonds to cardboard, poly mailers, and boxes without peeling mid-transit. No re-sticking, no lost packing slips.
• Waterproof and moisture-resistant: Clear plastic construction protects your packing slips and documents from rain, humidity, and condensation without smearing the print.
• Tamper evident for professional security: Once sealed, the pouch makes any interference visible. Your documents arrive exactly as you sent them.
• Barcode scannable from the outside: The crystal-clear front panel lets scanners read barcodes and tracking info without opening the sleeve. Faster processing at every stop.
• Peel and stick in seconds: No tools, no tape, no mess. Peel the liner, press onto the package, and you're done. Works on any clean, dry surface.
• Bulk packs for high volume operations: Available in 100, 200, 300, and 500-unit packs so you're never scrambling for supplies on a heavy shipping day.

If your packing slip disappears somewhere between your warehouse and your customer's door, that's a problem that shouldn't exist. FlexTribe shipping label sleeves are designed for the reality of modern fulfillment packages that travel long distances, get sorted by machine, and sometimes sit in the rain before delivery.

The adhesive back is strong enough to hold on cardboard boxes, poly mailers, and padded envelopes without lifting at the corners. The clear plastic front keeps your packing slip, invoice, or shipping label visible and scannable throughout the entire journey no opening required. And because each sleeve is sealed once applied, any tampering is immediately obvious, which matters when you're sending important documents or itemized invoices.

Application is genuinely fast. Peel the liner, press the sleeve flat, and move on. The 7x10" size handles standard shipping labels and A4-folded documents; the 6x10" fits most packing slips; and the 9.5x12" accommodates full letter-size (8.5x11") pages without folding. Choose your size, choose your quantity, and keep shipping.

• E-commerce fulfillment teams: Attach packing slips to every outbound order in seconds, without fumbling for tape or worrying about slips falling off during transit.
• Amazon, Etsy, and eBay sellers: Keep your invoices, receipts, and return instructions visible on every package — clean, professional, and carrier-ready.
• Warehouses and 3PLs: High-volume operations need a packing slip solution that keeps up. Bulk packs of 500 mean fewer re-orders and uninterrupted workflow.
• Businesses shipping internationally: Customs documentation needs to stay attached and readable. Waterproof, tamper-evident sleeves make international compliance easier to manage.
• Print on demand and subscription brands: Include product cards, thank-you notes, or promotional inserts in a sleeve that keeps them protected and presentable on arrival.