ISA: SUP Surfing Hits the Water in Cold Hawaii With World Champions to Be Crowned at 2017 ISA World SUP and Paddleboard Championship 0 08 Sep 2017 09:04 Playak 2016 Defending Gold Medalists Zane Schweitzer (HAW) and Shakira Westdorp (AUS) in top form, notching Wednesday’s top heat totals.