Features: Product Principle: Negative ions anti-static wristband is mainly made of biological silica gel tourmaline germanite magnetite and other natural ores as well as high-quality metals which can emit beneficial negative ions. It is a healthy product with novel and fashionable design and environmental protection. Various Functions: 1.Improve sleep. It is suitable for people with poor sleep quality for a long time. 2.Improve strength. Suitable for athletes marathons and other high endurance activities. 3.Improve balance. Suitable for those who need human balance. 4.Waist pain relief. Suitable for people who use the computer for a long time and have sore wrists when exercising. 5. Improve flexibility. Suitable for professional athletes. Function Module: The black area is the anion mineral strengthening module which is environmentally friendly healthy waterproof and wear-resistant. Silver particles scattered on the visible surface of the module under light are germanium powder fused with silica gel which is a normal phenomenon. Accelerate Blood Circulation: The wearer will be more likely to feel warm when the blood flow speed of the human body becomes faster in winter. Under the scientific research background the temperature balance rate of the wearer is higher than usual and people who often feel cold hands and feet can experience obvious effects. Wide Application: The negative ions anti-static wristband is not only suitable for weddings dates parties holidays celebrations Valentine's Day birthdays Christmas and other occasions but also suitable for various clothing styles and makeup so that you can stand out and be confident. Notice: Actual color may be slightly different from the image due to different display and light effect. Please allow 1-3cm deviation due to manual measurement. Specifications: Material: Silicone Size: 24cm (Adjustable) Color: Black/Red/Blue includes: 1 *Silicone Bracelet