Katadyn is the world's leading brand in portable water filtration and purification, trusted by outdoor adventurers, military personnel, and humanitarian organisations for over 80 years. Engineered in Switzerland, Katadyn's filters, purifiers, and desalinators are built to deliver safe drinking water from virtually any source — from backcountry streams to open ocean. When clean water is non-negotiable, Katadyn is the brand professionals trust.