We asked our riders for the tech they prefer in a double BOA® boot, and this is the result. Introducing the Renin—a supportive, forgiving boot with consistent and smooth flex that fits great straight out of the box. The all-new BOA® Mobility Conda creates a more mobile heel hold system, and new Endo 2.0 construction delivers fluid flex for daily laps on the hill. A favorite at the K2 Snowboarding headquarters and of our team riders around the globe, the Renin is the new flagship in the K2 boot line.