The Men's RHEON™ Marathon Speed Shorts are built for race day, combining integrated RHEON™ muscle-oscillation management with an ultralight, close-fitting half-tight silhouette. The technology targets the upper leg's major muscle groups to reduce fatigue and maintain running efficiency as distance and pace accumulate. A bonded storage system keeps nutrition and essentials secure and bounce-free throughout the run, while the streamlined race fit moves cleanly through each stride without restriction.