Features:Adjustable wrist band replacement watch strap for Polar A300.Lightweight and compact, seamless waterproof design, suitable for swimming or diving.The size of the wrist band can be adjusted according to the circumstance of the wrist to meet different people.Soft breathable silicone material made, great for sports and fittness.Varieties of colors for you to choose, feel free to choose the color you like to decorate your watch. Specifications:Material: SiliconeNet Weight: 30gGross Weight: 31gLength of Strap: 96mm+142mm/5.59 inchesWidth of Strap: 22 mm/0.86 inches Note:Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1 Piece Wrist Band(without smartwatch)