Polywrap and Polywrap Manufacturers

Manufacturers and mailers of flat-size mail must comply with USPS-T-3204, which went into effect February 4, 2007. In 2006, the USPS conducted a thorough study of automatable polywrap films to ensure compatability of automation flats with flats sequencing systems (FSS) and stand alone mail prep (SAMP) according to standards AFSM 100 and UFSM 1000.

Who Should Use this Product?

This section also includes information for manufacturers, distributors, and Mailpiece Design Analysts.


USPS-T-3204, "Test Procedures for Automatable Polywrap Film", describes exact test procedures and acceptable values for the new polywrap film characteristics for polywrap to be used on mailings of automation-rate flat-size mailpieces as of August 8, 2011. It also provides a list of testing laboratories that have experience in conducting these tests.

The Polywrap Manufacturers link is a downloadable document which lists polywrap manufacturers and distributors of polywrap approved for use on automation rate flat-size mailpieces in compliance with DMM standards effective February 1, 2007. Mailers may use polywrap in this list immediately, but are required to use approved polywrap from this list as of March 4, 2007 when using polywrap on automation rate flat-size First-Class Mail, Periodicals, and Standard Mail, and on barcoded Bound Printed Matter mailpieces.


Manufacturers, Distributors, and Mailpiece Design Analysts (MDAs) should mail Certificates of Conformance, including, if available, Independent Laboratory Conformance Test Results, to: Product Classification, 475 L'Enfant Plaza SW, RM 4446, Washington DC 20260-5015; or EMAIL to: Product Classification, ATTN: Polywrap Specialist, ProductClassification@usps.gov

Featured Resources

Contact Lists
User Guides
Test Procedures for Automatable Polywrap Film

This document provides updated information for USPS-T-3204 - Test Procedures for Automatable Polywrap Film sections referenced in the Domestic Mail Manual (DMM) for the U.S. Postal Service (USPS). Requirements identified in the DMM 201.4.5.  Polywrap Specifications refer to specific sections for test methods in USPS-T-3204 – Test Procedures for Automatable Polywrap Film.

Related Products

Flats Sequencing System

The USPS® is deploying a new technology that will boost efficiencies in the processing, distribution, and delivery of flats–the Flats Sequencing System (FSS). FSS will automatically sort flat-sized mail into delivery point sequence at high speeds. The efficiencies gained by employing FSS are influencing many changes within both the Postal Service® and the mailing industry.


For questions, please contact Product Classification by email at ProductClassification@usps.gov.