Hi the MyTheresa site only sells 100% authentic designer items. They're a very trustworthy company.
In regards to Chevre leather, yes they discontinued using chevre leather several years ago, they mostly use Agneu Lambskin leather on the motorcycle Bags now. However they do make limited edition city Bags in other materials like canvas, suede, nylon, sherling and chevre goatskin leather.
If you want chevre leather you'll either have to buy the new Metallic Edge City Bags or buy a pre loved Balenciaga bag from a few years ago
In regards to Chevre leather, yes they discontinued using chevre leather several years ago, they mostly use Agneu Lambskin leather on the motorcycle Bags now. However they do make limited edition city Bags in other materials like canvas, suede, nylon, sherling and chevre goatskin leather.
If you want chevre leather you'll either have to buy the new Metallic Edge City Bags or buy a pre loved Balenciaga bag from a few years ago