- Unisex Rectangle Reading Glasses in Gunmetal by Foster Grant - Gavin Fold Flat - +3. This sleek and sturdy universal frame folds perfectly flat into a slender carrying case.00. Unisex Rectangle Reading Glasses in Gunmetal by Foster Grant - Gavin Fold Flat - +3.
Each pair features 2 LEDs (one on each temple) that are each individually activated with an easy flick of a switch on the inner temple and powered by two flat button-sized batteries that last on average 50 hours.