Fake. Nike insole is fake without logo. Nike insoles must be fake if they are not marked. Some Nike mid-range running shoes series and trend casual shoes series have no Nike logo on the soles, but there must be Nike logo on the insoles; Basketball shoes in general, all of them. Specific analysis of specific problems. Some soles will abandon Nike's tick mark for anti-slip design. For example, airmax20 15 sole has no Nike check mark.