Unauthorized authentic quality products are authentic production units made from the same factories using the same materials.
Large shoes company will contract in many factories they brand shoes, each quarter will assign each factory a quota of some model, such as the current quota is 30000 pairs, the factory will produce 10000 more to cope with the large companies to check their production shoes whether qualified, to prevent unqualified because some shoes lead to big company refused to pay all payment for goods, if all the shoes are qualified, that the rest of the 10000 pairs of shoes big companies would not be in need, not this part of the money paid to the production factory,So that is how the term “UNAUTHORIZED AUTHENTIC” came about. All this extra pairs that are left over, are produced at the same factory, by the same workers, with the same material, just that they did not get licensed/authorized/quality checked by the shoe company. The factory will then sell this left over shoes to sneaker dealers, and online stores.
In terms of quality, Unauthorized Authentics are identical to originals since they are produced in the same factories (using the same exact materials) as the authentic product when they were commissioned by shoe manufacturers and companies.