1.Design elasticity to fit any wrist

2.Main materials: fiber and resin

3.Special materials: titanium and germanium

4.water resistance
5.Weight:10 grams

6.Minus ion( above 1900 ions/cc), Far infrared Ray (above 90%)

7.Available Size:14cm, 16cm, 17cm, 18cm, 19cm

8.High quality silicone rubber is no harm to skin,
9.Color: blue, black, white, pink, green, purple, yellow, etc.