Crowell Reef swimming goggles blue Crowell swimming goggles will allow you to start training with proper preparation. The lenses are connected to each using a flexible bridge. Split, silicone strap with adjustment. Anti-Fog coating protects the glasses from fogging. The glass is made of polycarbonate with increased resistance to all types of damage and scratches . Built-in UV filter. Included reusable plastic box. Material: polycarbonate PC, silicone