Mailing bag MAILmedia B4 120 g/m² pack of 250 – tear‑resistant padded mailer

MAILmedia B4 120 g/m² mailing bags, pack of 250, are tear‑resistant padded mailers designed for shipping documents and flat items in B4 format. Constructed from 120 g/m² paper with internal padding, these mailers combine low weight and structural stiffness to reduce bending and provide basic impact protection during transport. Supplied in a bulk quantity of 250, the pack suits regular dispatch operations where consistent, economical protective envelopes are required.

Advantages

These MAILmedia B4 padded mailers offer a balance of economy and protection: the 120 g/m² paper provides measurable stiffness while remaining lightweight, and the tear‑resistant construction helps preserve contents from minor handling damage. Supplied as a single bulk pack of 250, the mailers simplify stock management and reduce the per‑unit cost for high‑volume mailings. The internal padding cushions flat items and helps maintain document integrity in transit.

Suitable for

• Sending documents, brochures and certificates in B4 format
• E‑commerce sellers dispatching flat printed materials or soft goods
• Office bulk mailings, invoicing and customer communications
• Archival transfers and internal courier shipments

Key specifications

• Format: B4 (suitable for B4‑sized documents)
• Paper weight: 120 g/m²
• Padded construction for basic cushioning
• Tear‑resistant outer layer
• Pack quantity: 250 mailers
• Lightweight design to minimise postage costs

How to use

Insert the document or flat item into the mailer so it lies flat against the internal padding. Ensure edges fit within the envelope dimensions to avoid corner damage. Seal the mailer securely according to the adhesive closure provided or with additional tape if required for heavier contents. Address and label the exterior clearly and, where appropriate, include a packing slip inside to identify the contents. For consistent results, use the mailers as part of an organised fulfilment workflow and handle sealed mailers by their centre to reduce stress on the seams.

Usage recommendations

These padded mailers are intended for basic protection against bending and light impact; they are not suitable for heavy, sharp or highly fragile items. For valuable or very fragile goods, combine the mailer with additional internal protection or choose a rigid box. Store unopened packs in a dry environment to maintain paper strength and adhesive performance.