Whoop HydroKnit Bicep Band for WHOOP 4.0 – Fast-Drying, Upper Arm Wearable for Fitness & Water Sports

Designed for high-performance lifestyles, the Whoop HydroKnit Bicep Band offers a water-repellent, fast-drying solution for individuals engaged in intense workouts or aquatic environments. This upper arm wearable has been engineered with WHOOP's proprietary HydroKnit fabric—drying twice as fast as SuperKnit and retaining 30% less moisture. Whether used during water sports, high-intensity training, or daily showers, the bicep band ensures your WHOOP 4.0 sensor continues capturing accurate health and performance data while your wrist remains completely free.

Ideal for athletes, swimmers, or anyone who finds wrist placement restrictive, this bicep band maximizes flexibility and comfort while maintaining sensor accuracy. The band is equipped with the Fast Link™ slider for easy swapping, a durable stainless steel clasp and hook, and is only compatible with WHOOP 4.0. Available in two sizes for a secure, customized fit, it meets both functional and sustainability standards thanks to its composition of 92% recycled polyester.

Key Features:

• HydroKnit Technology: The fabric dries 2x faster than traditional SuperKnit and retains 30% less water, making it perfect for aquatic use or heavy sweating.

• Upper Arm Placement: Designed to free up the wrist by securely holding the WHOOP 4.0 sensor on the bicep.

• Fast Link™ Slider: Allows quick and easy swapping of bands without tools.

• Eco-Conscious Materials: Constructed from 92% recycled polyester and 8% elastane, offering durability and environmental mindfulness.

• Premium Build: Includes a stainless steel hook and clasp for a secure fit and extended lifespan.

• Size Options:

  • S/M: 12 inches / 30.5 cm

  • L/XL: 17 inches / 43.2 cm

• Compatibility: Exclusively compatible with WHOOP® 4.0.

• Care Instructions: Hand wash with mild soap in cold water; air dry only.

Conclusion:
With its advanced HydroKnit material, user-centric design, and seamless compatibility with WHOOP 4.0, the Whoop HydroKnit Bicep Band offers a reliable and performance-focused alternative to traditional wrist wearables. Whether in the gym, the pool, or your daily routine, this bicep band has been crafted to keep your health metrics on track—without compromising comfort or function.