polyurethane (TPU) layered one over the other in a machine. These kinds of plastic layers are and then heated to make them way more versatile. During this phase they also adhere together; it’s a bit just like using a laminating machine. Over the following step, the plastic layers are usually pressed through special adjusts, so they end up having the proper Nike Air sole condition. This plastic is then removed from the moulds and filled up with pressurized nitrogen gas. Following inspection, the Nike Surroundings soles are ready to be became a member of onto the rest of the shoe : in this case, the UA AIR Zoom Pegasus 35.
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