silicone watch strap 1.Material: Silicone/NBR/NR, any color. 2,pass SGS,CE,Rohs 3.High quality 1,Made by grade of silicone rubber and it mixed MAGMA-Q&Tourmaline2,This ion silicone watch can emit negative ions and infrared which made you calm,soothe and relax your mind,also it relieves your body tension,promote your sleep.improve concetration,ehance your energys and your imune function.3,Light ...