The Silver Seal keyboard offers excellent typing comfort with high resistance to liquids and contaminants, as the antimicrobial effect of Silver Seal products is based on the incorporation of a nano-substance in the plastic. This contains silver ions that destroy the bacterial cell nucleus and inhibit their growth. Silver Seal is used where a minimum level of hygiene responsibility is necessary, such as in the food service industry, public service areas, hospitals and medical practices, pharmacies, and laboratories. It is 100% waterproof and dustproof (IP68, NEMA 4X) and dishwasher safe for all commercially available dishwashers up to 60°C (dishwasher heat drying must be disabled).