Crowell GS20 Flo Green and Black Swimming Goggles. Crowell swimming goggles will protect your eyes from chlorinated water during pool training. This model is recommended for adults and youth. The lenses are made of polycarbonate, which offers increased resistance to damage and scratches. An anti-fog coating, an additional layer of the lens, prevents fogging. Ergonomic shape. Silicone, adjustable clasp. Built-in UV filter. The goggles come with a plastic case. Material: PC polycarbonate, silicone