The kraft bubble mailer combines a classic rustic appearance with modern double protection. The outer kraft paper is strong, tear-resistant by hand and excellent for writing on, while the inner HDPE bubble lining absorbs shocks during handling. This 50-piece pack with its versatile C6-DL-class size is for those who ship medium-sized flat items on a daily basis.
What is included in the 50-piece pack
The pack contains 50 kraft bubble mailers, each with an outer dimension of 135×225 mm and an additional 40 mm closure flap. The total weight is approximately 0.99 kg, and a single mailer weighs around 18 grams. The mailers arrive in a flat bundle, making the format compact and easy to store.
Material and bubble lining
The outer layer is cut from durable kraft paper, whose warm brown base tone gives the parcel an immediately recognisable look. Kraft paper is particularly resistant to tearing, so it retains its shape during postal handling. Inside, an HDPE-based bubble lining protects the contents from shocks and vibrations with evenly distributed air cells. Together, the kraft exterior and HDPE interior deliver two-layer protection.
Size and use
The 135×225 mm outer dimension accommodates DL and C6 paper formats, making it suitable for virtually every standard postcard, greeting card or document. It also fits a small softcover book, a thin calendar, a cosmetic item such as a tube or ampoule, or 2-3 textile sample layers. For webshops in card, paper or small cosmetic categories, this is an everyday size.
Closure and opening
The +40 mm closure flap has a self-adhesive strip on its inner side. After removing the protective tape, the flap closes in a single motion, providing a durable, tamper-evident seal. The recipient opens the envelope along the flap with a tearing motion. Once opened, the seal does not re-stick reliably enough to provide proper postal security again.
Storage and durability
Store the mailers as a flat bundle in a dry, cool location, protected from direct sunlight. Humid environments, prolonged sun exposure or high temperatures gradually weaken the adhesive strip. With proper storage, both the kraft paper and the bubble lining retain their qualities for many months, so you can comfortably hold a few weeks' or months' stock.