For WHOOP 4.0 Fitness Tracker Elastic Polyester One-Piece Wrist Strap with Adjustment Buckle - Grey Versatile CompatibilityDesigned specifically for Whoop 4.0, ensuring a perfect fit and seamless integration with your device. Comfortable Elastic DesignFeatures a one-piece elastic band with a D-ring buckle for easy adjustment and secure fastening. Premium MaterialsCrafted from durable polyester, offering both flexibility and strength. Adjustable FitAccommodates a wide range of wrist sizes from 150mm to 290mm, ensuring a comfortable fit for most users. Lightweight ComfortWith a light weight, this band provides a barely-there feel for all-day wear. Specifications: Material: Polyester and PC Dimensions: 290mm x 22mm Wrist Circumference Range: 150mm - 290mm Weight: 11.3g Compatible with: WHOOP 4.0 Package included: 1 x Watch Strap Not included other items Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store