When your adventure could be extreme, you need efficient, long-lasting, durable filtration. The rugged workhorse of our filters, the classic Katadyn Pocket is a small but reliable friend you want along to keep you healthy and hydrated. Decades of military and emergency professionals around the world have put their trust in the Pocket's ability to deliver water free of bacteria and protozoa. Quickness counts too with an output of 1 litre/minute through our silver-impregnated ceramic filter. This steel bomb of a filter comes with a 20-year warranty - that's confidence you can count on.