The sports waterproof bracelet, porous design, the size can be adjusted freely, suitable for all people to wear, it can greatly reduce the number of static electricity. strong magnet, more convenient to use. Compact size, light weight, portable and easy to carry, comfortable to carry and easy to use. Material: Special environmentally friendly anti-static silica gel, soft and comfortable, containing mineral elements such as silicon and negative ions. Not easy to damage, sturdy and durable for long term use. Effectively reduce the problem caused by static electricity generated by the human body. Gifts: Can be used as an ornament, ideal gift for birthday, Christmas, Valentine's Day for lovers, objects, parents, children, friends and girlfriends. Ergonomic watch design, say goodbye to static electricity problems. Intense exercise does not fall off, Suitable for outdoor activities such as driving, running, riding, climbing. Matters needing attention: Avoid contact with strong acid detergents / no high temperature / no pulling force. Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Due to manual measurement, please allow slight size errors.