Features: Perfect match for Apple iWatch SERIES 3 (38mm/42mm Optional) Aluminum Alloy Frame OVERALL PROTECTION with strong impact resistance. Toughened ultra-thin glass(0.2mm) with cambered surface, high transparency, high touch sensitivity. Anti-fingerprint, anti-oil, anti-acid and other contaminants. Back side is covered with a strong silicon adhesive for easy installation and perfect fitting. Explosion-proof, shatter-resistant, even if broken, it will not splash about, much safer than other glass products.