How to Specify an Insulated Medical Mailer for Stable Transit

Choosing an insulated mailer for medical products starts with matching its materials and closure to the shipment’s requirements. This design combines a reflective metallised-film exterior, 20 mm of full-face sponge insulation, and a wipe-clean PE inner layer. Its flat profile is intended for practical storage and shipping, while custom dimensions and material options allow buyers to tailor the bag to their products.

Construction and Closure

The outer metallised film provides a reflective surface and can be printed. A continuous 20 mm sponge layer covers the mailer rather than appearing only in selected areas. On the inside, PE film acts as the sealant layer and can be wiped clean. The specification does not state measured temperature-retention results, so performance should be checked against the required temperature range and journey time.

The mailer has three welded sides and an opening fitted with both a two-rib zipper and a peel-and-seal adhesive strip. It is supplied as a flat, gusset-free format that can be stacked before use. Listed sizes are S, M, L, and XL; custom width-by-height dimensions are also available.

Options and Cold-Chain Applications

Buyers may request changes to sponge density, film gauge, matt silver finish, and printing. The metallised film supports one- or two-colour artwork, with a white underlayer when needed. Samples are stated to take 3 to 5 working days, and production takes 15 to 25 days after artwork approval. Minimum order quantities are determined for each specification and target volume.

The stated applications include medicines, chilled foods, perishables, and samples. The manufacturer also describes separate pharmacy and 2–8°C cold-chain solutions that use a dedicated sleeve for a phase-change gel pack and a front window for temperature-monitoring and batch labels. These features are not listed as standard components of the mailer described here, so buyers should confirm them when requesting a quotation.

Quality and Supplier Information

Huizhou Ecopack Packaging Products Co., Ltd. reports three quality inspection stages under its ISO 9001:2015 system: incoming material checks, in-process inspection, and pre-shipment inspection. Finished goods are subject to AQL sampling. The company also reports FSC Chain of Custody certification. A US distributor case describes recurring annual orders of insulated mailers and reduced storage and shipping-space needs compared with rigid foam packaging; the distributor is not named.

Specification at a Glance

Frequently Asked Questions

Is a gel-pack sleeve included?

No gel-pack sleeve is listed in this product’s specification. The company offers separate cold-chain designs with a sleeve for phase-change gel packs, so confirm the required configuration before ordering.

Can I order a made-to-measure mailer?

Yes. In addition to S, M, L, and XL, custom width and height can be specified. Buyers can also discuss sponge density, film gauge, matt silver finish, and print requirements.

How long do samples and production take?

Sample preparation is listed at 3 to 5 working days. Production is estimated at 15 to 25 days once artwork is approved. The minimum order quantity depends on the agreed specifications and order volume.

Choosing the Right Specification

For medical transport, define the required dimensions, temperature range, transit duration, and closure before selecting this mailer. Its specified build is a metallised-film outer, full-face 20 mm sponge layer, PE inner film, and combined zipper and adhesive closure. Because no measured temperature-retention performance is provided, validate the design for the shipment conditions, and specify a dedicated gel-pack sleeve separately if needed.

Established in 2011, Huizhou Ecopack Packaging Products Co., Ltd. is a manufacturer and exporter with in-house R&D, printing, lamination, bag making, and inspection. The company reports ISO 9001:2015 and FSC Chain of Custody certifications. For technical details or assistance, contact manager@ecoppack.com.

About the Manufacturer

Huizhou Ecopack Packaging Products Co., Ltd. is a flexible packaging manufacturer based in Guangdong, China. Founded in 2011, it produces custom composite pouches and bags, including insulated mailers, for customers in more than 40 countries. Its in-house operations cover R&D, printing, lamination, bag making, and inspection, with reported capacity exceeding 500,000 pouches per day. The company holds ISO 9001:2015 Quality Management System and FSC Chain of Custody certifications and has supplied insulated mailers for cold-chain shipping.