Hi-tech formula: anti fog applies a transparent micro-thin coating to prevent the fogging/steaming up of spectacles during mask wear Multi-purpose: can be applied to all types of coated lenses including blue light blockers glasses, cameras, goggles, face shields and much more Soft and non-abrasive: use with confidence, high quality super soft fibre cloth glasses cleaner helps give a streak-free finish leaving no scratches, alcohol and odourless free Reusable & long lasting: proven defogger, gives you up to 48 hours clear vision and can be used time and time again. Better than disposable wipes, less packaging waste and kinder to our planet Easy to use: breath on the glass to fog up lens, gently wipe with the anti-fog cloth before the fog disappears. Repeat on the other side. Simple!