SEAC Pura Anti-Fog MaskSEAC Pura Anti Fog Mask The SEAC Pura is a revolution in underwater optics, serving as the first diving and snorkeling mask to feature a permanent plasma anti fog treatment. By subjecting the tempered glass lenses to a specialized gas process at controlled temperatures, the glass becomes hydrophilic, naturally retaining a microscopic layer of water that eliminates condensation. This treatment is applied twice during manufacturing, ensuring a long