- Enhanced optics and coatings: tempered optical glass provides about 92% lens transmittance. An AR coating increases transmittance to over 98%, and a water-repellent coating yields a water contact angle of 115 degrees so water droplets bead up and do not linger on the lens surface, preserving image quality. - Improved seal and buckle: upgraded sealing and a secure buckle for reliable protection in demanding conditions. - Robust construction: 40 m end caps with symmetric locking; the housing body is thickened for rigidity and resists deformation. - All around protection: not only for diving, but also guards your camera and lens against scratches and scuffs. - Use scenarios: underwater photography and videography up to 40 m depth; travel and outdoor shoots where gear is exposed to moisture, dust, or impact; general protection for storage and transport to prevent scratches on your camera and lens.