High retention fastener

A retention fastener (10) includes a body panel (14) and first and second leg members (16, 20) connected to the body panel (14) by first leg member portions (40). Both leg members (16, 20) co-extend away from a body panel first panel face (38) and have a second portion (42) directed back toward the body panel (14). The first and second leg members (16, 20) include at least one retention feature (46) connected to the second leg member portion (42), including: a single tooth wing (50') having a smooth curved surface extending to a single wing retention tooth (64'), and a multiple tooth wing (52') positioned beside the single tooth wing (50'). The multiple tooth wing (52') has individual teeth (56', 58', 60', 62') on a curved surface sequentially increasing in height with respect to the curved surface. The multiple tooth wing (52') is oriented in a superimposed position with respect to the single tooth wing (50') so the individual teeth extend outwardly with respect to the smooth curved surface of the single tooth wing (50).