necklace and bracelet

silicone necklace1.Material--100% silicone,flexible.nontoxic and non-stick;muscle power up,improve blood circulation.sooth tension,enhance upgrade the power of concentration very helpful for students.researchers. businessmen and athlete;can suitable for adult and children;4.Design many other cute,professional design,assorten colors;5.Logos can be printed&embossed&debossed&3D dimensional&color-fulled logos;6.Different designs ,sizes colors and logo are available7.OEM&ODM welcome