The Katadyn Group has transferred the distribution of its own outdoor brands in Switzerland to Naturzone, starting on Jan. 1. The brands are Katadyn, Trek'n Eat, SteriPen, Micropur and Optimus. Naturzone is also taking over the Swiss distribution of Aku, Deejo, Teko, Klean Kanteen and Opinel, which was previously handled by the Katadyn Group.