The basic building materials of polyester are petroleum, hard coal, lime and natural gas. The chemical fiber is manufactured from polyethylene terephthalate, better known as PET. The synthetic fiber is mainly made from petroleum-derived chemicals, specifically, purified terephthalic acid (PTA) and monoethylene glycol (MEG). Polyester is WIDELY used in the textile industry to produce a variety of products, including clothing, home furnishings and industrial fabrics. The main reasons for the wide usage include its durability, wrinkle resistance, color retention and affordability.
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Unfortunately, the usage of the synthetic fiber polyester comes with a lot of environmental disadvantages. The production of polyester is not only very energy-intensive, but it also is based on non-renewable and damaging resources like petroleum. Additional, polyester itself is not biodegradable, and the usage of polyester fibers is one of the main contributors to the world's plastic and microplastic pollution.
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I would describe this case as thermoformed EVA with a poly jersey outer. The jersey is adhered to the EVA before molding into the final form. I agree with the post above that the edges should be finished with binding because it will help prevent the outer fabric from de-laminating through use and give a clean appearance.
Many other outer fabrics can be used to cover the EVA. Lycra is generally more expensive than poly jersey, but gives a neoprene-like look. Other polyesters work well too - you can play with textures to create an appearance that is coarse and rugged, or smooth and easy to clean.
In terms of creating a tech pack for your design, I have worked with suppliers in China that do not have 3D software and prefer 2D dimensioned ortho and section views, where others have asked for a 3D file.
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