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EVF91201

Custom Flat Wrap Envelope

Available in a wide range of custom configurations & material selection.
Order 1 sample. Or order 100K+ units. Or anything in between.
Affordable delivery across North America.
Design support, warehousing, testing, assembly available.
Widest machinery capability in America via 30+ specialist partner plants.

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Product details

Top highlights

Zero-glue tongue-and-slit closure
Folds flat around thin, lightweight products
Delivered flat for high-density storage and manual packing

About this product

The EVF91201 is a one-piece, flat paperboard wrap that folds around thin products to create a clean, unglued envelope. Delivered completely flat, it uses a simple four-flap cross-fold and a friction-fit tongue to secure the contents.

Because it bypasses folder-gluer processing, this wrap is a practical choice for documents, flat samples, gift cards, and thin apparel. However, it relies entirely on the board's flexibility to fold flat, meaning it fits very thin items and usually needs an outer mailer or seal for parcel shipping.

Common uses

Gift cards and vouchers
Thin apparel and textiles
Flat samples and documents
Welcome kits and onboarding folders

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Product fits for the flat wrap

Gift cards and vouchers

The flat profile and clean inner flaps provide a simple presentation for gift cards, vouchers, and small paper goods. The unglued design allows the recipient to unfold the entire wrap to reveal the contents.

Thin apparel and textiles

Lightweight, compressible items like scarves, ties, or thin shirts can be packed by folding the wrap directly around the folded garment, keeping the presentation neat without using a full folding carton.

Flat samples and documents

Useful for organizing promotional materials, flat product samples, or document kits. The wrap keeps the items bundled together for hand distribution or insertion into a larger master shipper.

Welcome kits and onboarding folders

A flat wrap provides a clean, unglued presentation for employee welcome kits, event schedules, or VIP document bundles. The recipient can unfold the entire package to view the contents at once.

Hand assembly and retail presentation

Manual packing stations

This wrap fits hand assembly. The packer places the product on the center base panel, folds the top and side flaps over, and secures the bottom flap by inserting the tongue into the receiving slit. It bypasses automated erecting lines entirely.

Retail presentation

The clean, flat appearance fits lightweight retail items that stack flat or sit in counter displays. The inner faces of the flaps are visible upon opening, making two-sided printing a valuable option for premium unboxing experiences.

Direct mail campaigns

When placed inside a rigid outer mailer, this wrap acts as a premium inner presentation layer for direct mail. The unglued design allows for a full interior reveal without the complexity of a rigid setup box.

When to compare a box with defined depth

Thick products and bowing risks

This template has single crease lines and relies on the flaps folding 180 degrees flat. If the product is thicker than a few millimeters, the flaps can bow outward, which can keep the tongue from reaching the locking slit. For thicker items, compare a roll-end tray or a wrap with a defined depth panel.

Parcel shipping and outer protection

The friction-fit tongue fits presentation and light handling. If the wrap ships individually through a courier network, it often needs a rigid mailer or a strong outer seal to keep the tongue from releasing during transit.

Board flexibility, grain direction, and closure

Board thickness and flexibility

Board choice is critical. The material needs enough flexibility to fold 180 degrees without cracking, while staying stiff enough for the tongue to hold its shape when inserted. Standard folding boxboard is typical, but heavier boards may need scoring adjustments or cause the lock to fail.

Grain direction

To minimize cracking on the main 180-degree folds, the board's grain direction should run parallel to the longest creases. This detail affects the final presentation, especially if heavy ink coverage is planned.

Print and finish surfaces

Because the wrap unfolds completely, the inside of the top and side flaps will be visible to the user. Decide whether the interior needs printing or a specific coating to match the exterior presentation.

Closure security and sealing

While the tongue and slit provide a friction fit, decide if the wrap needs a clear wafer seal or custom sticker to keep it closed during handling or insertion into master cartons.

Adjusting the tongue lock and side flap angles

Tongue and slit sizing

The width and length of the locking tongue, as well as the receiving slit, can be adjusted to tune the friction fit. These dimensions are tightly coupled; changing the tongue size means adjusting the slit to match.

Side flap angles

The angle of the trapezoidal side flaps can be modified to change the interior visual reveal when the wrap is opened, or to adjust how much of the product is contained laterally.

Thumb notches or finger cuts

The top flap can be modified with half-moon cutouts near the slit to make it easier for the recipient to grip and release the locking tongue.

Packing details

Flatbed die-cutting and nesting efficiency

Because it uses no gluing, this wrap is produced in a single flatbed die-cutting step. This keeps manufacturing straightforward and allows for high nesting efficiency on the sheet, making it an efficient package to produce and store.

Additional notes

Testing the closure with physical samples

Because the tongue lock relies on the exact thickness of the product and the flexibility of the chosen board, a physical prototype helps confirm the fit before a full production run.

FAQs

How thick can my product be for this wrap?

This wrap fits very thin or flat items, typically under 2-3 mm. Because it uses single crease lines, forcing a thicker product inside can cause the flaps to bow and prevent the tongue from locking securely.

Does this wrap need tape or glue to stay closed?

It uses no glue for assembly, as the tongue and slit provide a friction fit. However, if it is shipped individually through the mail, a clear wafer seal or an outer mailing envelope is usually needed to help keep it closed during rough transit.

Can this wrap be erected on automated packaging lines?

The cross-fold design and tongue-and-slit lock fit manual packing at fulfillment stations. The blanks are delivered completely flat, and the packer folds the four flaps around the product by hand.

What board works well for this design?

A standard folding boxboard around 0.5 mm is typical. The board needs to strike a balance: flexible enough to fold completely flat without cracking, but rigid enough that the locking tongue does not crumple when inserted.

Can I print on the inside of the wrap?

Because the wrap unfolds completely when opened, the inner faces of the flaps are clearly visible to the user. Two-sided printing is frequently used to enhance the unboxing presentation for gift cards, vouchers, or apparel.

How is this wrap delivered to my packing facility?

It is delivered completely flat. Because there are no glued seams, the blanks stack densely on pallets, which reduces shipping and storage space.

Can I use a heavy corrugated board for this wrap?

This design relies on the flaps folding 180 degrees flat against the base. Heavy corrugated board can crack or resist folding flat, which can prevent the tongue from reaching the locking slit. Standard folding boxboard is a better fit.

Is this wrap safe to mail on its own?

The friction-fit tongue fits presentation and light handling. If shipped individually through a courier network, it usually needs a rigid mailer or strong outer tape to keep it from opening.