Nylon Sport Ankle/Arm Band Compatible with Google Fitbit Air

【Compatible with Google Fitbit Air】This extended arm ankle band is for Fitbit Air fitness tracker. A practical replacement strap for users who prefer wearing the tracker on the upper arm or ankle during sports.(this product does not include a tracker module) 【2 Size: 430mm / 500mm】Available in two extended sizes to fit different arm and ankle needs. Small size total length is about 430mm, and large size total length is about 500mm. Please measure your upper arm or ankle before choosing. 【Breathable Nylon Sport Strap】Nylon fabric that remains comfortable even during intense exercise or throughout the day. The material that helps with breathing reduces sweat accumulation and keeps the arms dry - perfect for exercising in the gym, even staying comfortable when sweating or raining. 【Extended Size, for Biceps or Ankles Wear】This is a longer sport band made for biceps and ankles only, not a regular wristband. Great for workout, running, gym training, cycling, walking, and fitness tracking when wrist wear is not preferred. 【Adjustable Hook Fasteners】 Simple hook design for easy tightness tuning, delivering secure, comfy fit. No slipping during activity, quick to wear and take off for sports.