Core Selling Points Professional swimming aid design to enhance freestyle performance Buoyancy balance technology: the armband adopts scientifically designed buoyancy distribution to help swimmers keep their body level, reduce sinking, and improve the fluency and speed of freestyle swimming. Lightweight material: Ultra-light and waterproof material is chosen for comfortable wearing without adding extra burden, suitable for long time training or competition use. Safe and durable material, suitable for high frequency use Environmentally friendly PVC/TPU material: non-toxic, odourless, tear-resistant, chlorine corrosion-resistant, suitable for high-frequency use in swimming pools, long service life. Anti-slip design: the inner wall of the armband is made of anti-slip texture or silicone lamination, which ensures that it is not easy to slide when swimming and improves safety. Suitable for multi-stage training, adapting to different needs Adjustable Inflatable Volume: Some of the armbands support inflatable volume adjustment, suitable for beginners (more buoyancy) or advanced (less buoyancy) to adapt gradually. Size Adaptability: Available in a variety of sizes to fit children, teenagers and adult arm circumference, meeting the needs of all ages. Functional Highlights Quick on and off: Velcro or snap design for quick on and off, saving training time. Highly recognizable colour scheme: Vibrant colours or reflective stripes enhance visibility in the pool, suitable for team training or open water use. Portable storage: Folds up compactly and fits easily into your swim bag, making it easy to carry to the training venue.