The Reigning Champ Performance program is a collection of premium athletic wear designed specifically for high-output running and training.

Featured in the program is Deltapeak™, an ultralight mesh fabric with a smooth dense surface that maintains shape and resists snagging. Developed in multiple weights, Deltapeak™ is a superior fabric for active environments.

Highly breathable and fast-drying, Deltapeak™ 90 is made for optimal comfort during demanding physical activity, elevating our range of training tops, including the Training Tank and Training Shirt.

Deltapeak™ 165—engineered as a double-knit mesh—combines with our Long Sleeve T-Shirt and Trail Shirt to create an ideal second layer, or heavy first layer, for workouts during temperature drops. Deltapeak™ fabrics offer UV protection and possess anti-microbial properties.

Deltapeak™ Performance product has been thoroughly tested by endurance athletes, trainers, and fitness professionals to ensure performance under the most demanding conditions.

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