Premium Nylon Elastic Sport Armband for Google Fitbit Air Key Features: - Compatibility: Custom-designed for Google Fitbit Air. - Figure-8 Clasp: Ultra-reliable metal clasp for smooth, secure, and personalized adjustment. - Premium Material: Woven high-elasticity nylon, soft, lightweight, and sweat-resistant. - Sport Optimized: Highly breathable design keeps the sensor snug for accurate data tracking. Sizing & Specifications: - Fits Arm Circumference: 250mm - 400mm - Available Band Dimensions: 400mm x 18mm - Style: Sport / Active / Casual Package Includes: 1 x Replacement Nylon Elastic Armband (Tracker NOT included).