Swimming goggles material: Lens: PC (polyester carbonate), goggles strap and ring: environmentally friendly high-elastic silicone     Features: high-grade PC lenses, waterproof, anti-fog, pressure-resistant, anti-ultraviolet, clear underwater vision! High hardness material, durable! Exquisite workmanship and multiple colors available!   Performance: anti-fog, waterproof, soft and comfortable to wear.   Glasses frame length: 14cm height: about 3cm (there will be some differences in different patterns and sizes) The rope can be adjusted and stretched.   Packing list: 1 pair of glasses