The spectacle is a hardcover (with air holes on one side provided) and different width inserts for the bridge of the nose come. The assembly of the spectacles is easily, the build quality is very good. The glasses sitting completely waterproof and relatively close to the eyes, after 30-45min swimming are with me, however, to see footprints. The headband is relatively fixed and is not as soft stretchy, like other glasses, which I have tested whether that represents an advantage for competitive swimming, I can not judge, because of my rubber might be a little easier stretched to a more comfortable fit for allow. The anti-fog coating has as expected after about 10 times Swimming given up the ghost but that's for other spectacles well too. Would I buy it again.
