The band that tracks steps, distance, calories burned and activity time is made from a flexible and durable elastic material similar to that used in many sports watches.
It also features a surgical more→-grade stainless steel waterproof buckle; wear-resistant and can be worn in the ocean, showers, pools, and more
Operating Temperature Operating temperature: 14 degrees Fahrenheit to 113 degrees Fahrenheit, maximum operating altitude 30,000
Fits wrists 170-215mm