Crowell Swimming Goggles Shark Marine 2552 Crowell swimming goggles will allow you to start training with proper preparation. The lenses are connected to each other using a flexible bridge . Split silicone strap with adjustment. Anti-Fog coating protects the glasses from fogging. The glasses are 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