In addition to using less packaging, we want to ensure we are always working on using better materials. This starts with the corrugated cardboard, the majority of which is used for the master outer cartons and shoe boxes shipped from our supplier facilities. Today, we are proud to say that our master outer cartons are made from an average of 89% recycled material, and our shoe boxes are made from over 90% recycled material.
As a signatory to The Fashion Pact, NIKE is also continuing work to eliminate problematic or unnecessary single-use plastics in our packaging by 2030. Across the globe, we have removed plastic bags from our retail stores. We have made further progress towards this commitment by converting plastic digital mailing envelopes to paper or compostable digital mailing envelopes in all of our geographies.
The largest volume of our single use plastic packaging is our apparel polybags, which are used to protect our apparel products. While we have explored the use of easier to recycle, paper-based alternatives, we have not yet found the right alternative for our supply chain and still view polybags as a necessary packaging item. However, we are committed to using better material and are almost done converting 100% of our polybags to 100% post-industrial recycled content.
While plastic polybags continue to be in use, we encourage our consumers to locate and leverage local plastic recycling collection points to help ensure this material is properly recycled.