Since its debut around last year's Air Max Day events, Nike's Air VaporMax unit has been a fixture of its footwear. The tech has been used on coveted collabs including Virgil Abloh's Off-White collections and recent releases with Acronym as well as a fast-growing group of hybrids such as the VaporMax Plus. But did you know it's also the latest effort in the brand's continued push for sustainability?

To break down just how impactful the innovation has been, Nike provided some stats and a step-by-step illustration of the VaporMax Air unit production process. The Swoosh was able to squeeze more than 75 percent recycled material into the unit, making it the most green-friendly Air bubble in Nike's archive. 

Nike produces its Air soles at what it calls Air Manufacturing Innovation plants based in Oregon and St. Louis. And here's how it does it.

Nike Air VaporMax Production (Step 1)
Image via Nike

It all begins with two sheets of TPU (thermoplastic polyurethane), which are fed into a thermoforming machine.

Nike Air VaporMax Production (Step 2)
Image via Nike

Heaters are then used to warm up the TPU sheets.

Nike Air VaporMax Production (Step 3)
Image via Nike

Once the TPU has reached its desired temperature, clamps are set in place.

Nike Air VaporMax Production (Step 4)
Image via Nike

The process continues by clamping down the TPU to create molds.

Nike Air VaporMax Production (Step 5)
Image via Nike

The molds function as the blueprint for the Air units.

Nike Air VaporMax Production (Step 6)
Image via Nike

The next step is beginning to trim down the molds.

Nike Air VaporMax Production (Step 7)
Image via Nike

Then the shapes must be cleaned up around the edges.

Nike Air VaporMax Production (Step 8)
Image via Nike

The fun part begins when pressurized nitrogen is pumped throughout the molds.

Nike Air VaporMax Production (Step 9)
Image via Nike

Which results in inflated Air bags primed for the final step: inspection.

Nike Air VaporMax Production (Step 10)
Image via Nike

Once they've been approved, the Air units are shipped to other Nike factories where they'll be affixed to uppers.

Nike Air VaporMax Production (Step 11)
Image via Nike

As a bonus step, Nike makes the process even more sustainable by re-using over 90 percent of its excess scrap material.