Secure Nonslip Fit and Adjustable Waist Strap: Offers a secure nonslip fit for multiple waist sizes with a detachable adjustable waist strap that ensures comfort during water activities and enhances buoyancy support. Optimized Swim Stability: Combines a secure buoyancy structure with fatigue alleviation and cramp care integration, boosting swimmer confidence. visibility tones increase visibility in the water. Secure Waterproof Compartments: Features meticulously designed sealed compartments and a waterproof storage system, supporting kayaking and swimming and prioritizing item security in water settings. Wearresistant Material: Provides punctureproof strength and water immersion resilience, offering longlasting durability and maintaining its shape with flexible, tearresistant fabric. 23 practical use scenarios Use during lap swimming or pool workouts to maintain buoyancy and a stable, secure fit without limiting movement. Use during openwater activities or transitions between kayaking and swimming, with waterproof compartments safeguarding small items. Use in training or casual recreation where reliable buoyancy, durability, and visibility enhance safety and confidence.