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Ergonomic & Non-Slip Design8-shaped ergonomic structure fits comfortably in both hands. Equipped with non-slip rubber patches for a secure grip even in wet conditions, ensuring stable training. Enhance Stroke TechniqueIdeal for adult swimmers of all levels, from beginners to competitors. Helps refine freestyle, backstroke, and butterfly strokes, strengthening muscles and stroke consistency. Premium MaterialCrafted from high-quality thermoplastic elastomer with excellent elasticity and water resistance. Skin-friendly, odorless, and for long-term use in swimming pools or open water. Optimize Forearm PositionDesigned to promote the early vertical forearm position, a key technique for efficient swimming. Corrects posture during strokes to reduce resistance and improve propulsion. Professional Swim Training AidOfficial training tool, trusted by coaches and athletes worldwide. and portable, easy to carry to the pool for daily technique training and skill improvement.