Effective learning companion: Supports step-by-step skill development with adaptive buoyancy, from initial water experiences to refining swimming technique with regular use. Breathable and comfortable: Soft EVA surface prevents skin irritation; waterproof outer shell with stable material architecture supports safe movement training. Versatile and adjustable: Adjustable buckle fits children and adults; ideal for family training, swimming courses, and leisure activities in pool or open water; universal companion for beginners and advanced swimmers. Ready to use: No preparation required; water-resistant quick-closure system with double security provides reliable hold during all movements. Use scenarios: - Family pool sessions with kids and adults, practicing buoyancy, kicking, and basic strokes. - Swimming lessons and technique drills in courses or clubs. - Recreational open-water or pool practice for gradual skill development and confidence.