Sport nylon loop band compatible with WHOOP 4.0 Activity Tracker. Designed for everyday wear and active use, this Black and Blue strap combines breathable comfort with a secure, adjustable fit. Key benefits Comfortable breathability: Stretchable elastic braided nylon is soft, lightweight, and breathable, allowing sweat to escape for drier skin during activity. Secure, adjustable fit: Adjustable loop buckles and sturdy hook and loop fasteners make it easy to size and lock the band for a reliable fit. Durable and flexible: Braided nylon construction stretches with movement while maintaining shape and strength for repeated use. Versatile style options: Available in multiple colors to match different outfits and moods; this listing is Black and Blue. Features and specifications Compatibility: Designed to fit WHOOP 4.0 Activity Tracker. Material: Elastic braided nylon that balances stretch and support. Fit and adjustment: Loop buckle plus hook and loop fastener for quick adjustments and a secure hold. Comfort: Lightweight construction minimizes bulk and reduces rubbing during prolonged wear. Practical use scenarios Running or gym workouts: Breathable material and secure fastening keep the tracker comfortable and in place during intensity movement. Hiking and travel: Durable, lowprofile design is easy to wear for long periods and adapts to changing conditions. Everyday and social settings: Clean, simple color options let you wear the tracker to work, social events, or casual outings without compromising style. Why choose this band Made for active daily use, the nylon loop balances comfort, adjustability, and durability so your WHOOP 4.0 fits securely and comfortably throughout the day.