The Goton Elastic Nylon Sport Strap is a high-performance replacement band designed for Whoop 5.0 and MG series trackers, including Peak and Life models. It is not compatible with Whoop 4.0, Whoop 3.0, or the Whoop Navigator Band. Precision Fit and Security: The strap features a reinforced polymer clasp engineered to 0.1mm tolerance, delivering a secure snap-on connection that stays locked during high-intensity training. Whether performing box jumps, kettlebell swings, or barbell cycling, the clasp tightens under tension to prevent accidental ejection One-Hand Sliding Buckle Adjustment: Unlike fixed-hole designs, the quick-adjust sliding buckle allows stepless tension control with a single finger. Tighten for locked-in heart rate readings during heavy lifts. Loosen for relaxed comfort during sleep. No tools required. No need to pause your workout Adaptive Two-Way Stretch Nylon: The high-density nylon webbing stretches in both directions, gently adapting to your wrist as it expands during exercise and contracts during rest. This maintains consistent sensor-to-skin contact for accurate HRV, sleep stage, and strain data without the need for constant readjustment Breathable and Quick-Dry: A honeycomb ventilation pattern wicks moisture away instantly and air-dries within minutes. Lightweight and skin-friendly, it is comfortable enough for 24/7 wear including hot yoga, swimming, and overnight sleep tracking Charge Without Removing the Band: A precision-cut charging port provides direct pass-through access for the Whoop 5.0 battery pack. Simply slide the charger onto your tracker without removing the strap Specifications: Material: High-density elastic nylon with polymer clasp and metal slider buckle. Width: Standard Whoop tracker width. Adjustable wrist circumference: 5.1" -8.0"(132mm -205mm) Care Instructions: Hand wash with mild soap and cold water. Air dry. Do not bleach or machine dry.