A headgear assembly includes a first arm member and a second arm member each having a first end and a second, opposing end. The first end of the first arm member has a structure sized and configured to engage a first rotation-resistant coupling of a frame in a manner which prohibits rotation of the first arm member with respect to the frame in a first plane in which the first arm member is located. The first end of the second arm member has a structure sized and configured to engage a second rotation-resistant coupling of the frame in a manner which prohibits rotation of the second arm member with respect to the frame in a second plane in which the second arm member is located. The assembly further includes a strap member coupled to the first and second arm members.