【Material】 strap is a retractable-type rubber material. The entire watch weighs only 10 grams, it is a good choice for climbing, sports, games or other sports

Anion sports watches used mainly imported raw materials silica gel which is environmental-friendly. Coupled with South Korea Anion powder formulations (Tourmaline), germanium powder configuration formed. In accordance with South Korea and Japan the same high quality standards which achieved 1700-1900 ions / cc of negative ions concentration, the concentration will change the negative ion content around you and makes you feel like at outdoors. long-term wear can ease fatigue, promote blood circulation and so on.
Any further questions is welcome.we will reply you in shortest time.

-Size:14.5cm/16cm/17cm/18cm
-Color:15 kinds available