World’s top-rated triathlon brand Zone3 will be the new Official Swim Partner of CHALLENGEALMERE-AMSTERDAM. Thanks to this partnership for the upcoming three years, participants of the second oldest race of the world will be provided with a wide range of specially designed endurance products. ,,We are very pleased to present our partnership with a well known and trusted triathlon brand”, stated CHALLENGEALMERE-AMSTERDAM Commercial Director Jort Vlam in a first comment.