Health protection silicone necklace

Health protection silicone necklace 1.Material--100% silicone, flexible, nontoxic and non-stick. 2.Use -- muscle power up, improve blood circulation, sooth tension ,enhance upgrade the power of concentration, very helpful for students, researchers, businessmen and athlete. 3.Size can suitable for adult and children. 4.Design-- many other cute, professional designs. Assorted colors. 6.Logos--can be printed & embossed & debossed & 3D dimensional&color-filled logos . 7.Different designs, sizes, colors and logs are available.