Aqua Sphere Size Chart Designed for the elite triathlete, the Phantom is a high-tech, water wicking speed suit designed to conserve your muscle strength, improve core stability, increase glide, and maximize endurance. Constructed using Exo-core technology with an integrated Core Power System, the dual-fabric combination provides an effective mix of muscle compression and freedom of movement. Features: - Exo-core technology combines 2 kinds of fabrics for compression and freedom of movement - Sewing free, no chaffing , High frequency welded panels for optimum comfort and long lasting - Core Power system that improve posture - Water repellent - Back zip for easy on and off