PUMA Men's Zone XT Training Shoes Color Puma Black Castlerock Poppy Red New without box PRODUCT STORY When the timer counts down and heart rate speeds up. That’s the zone where progress happens. Designed for high-intensity workouts and endurance-based running and training, Zone XT has maximum cushioning, support and grip, and heart rate-inspired design that reflects the heart it takes to keep pushing. Straight through the zone.