Triangel 38mm Ultrathin Hd Bubble Free Tempered Glass Screen Shield Protector for Apple Watch Iwatch (0.15mm Thickness) ultrathin-0.15mmthinkness that provides fasterresponse and flawless touch screen accuracy Long-Lasting Protection from Scratches, Bubble Free, Significantly Reduces Dust, Oil & Fingerprint Smudges Self-Healing Technology & Military Grade Material Designed to be Ultra Tough for your device Compatibility - Specifically designed for Apple Watch 38mm Exceptionally Clear & Smooth Glass-Like Surface