- Material : Made from high-quality silicone, ensuring flexibility and comfort. - Compatibility : Designed specifically for Whoop 4.0 and 3.0 models (fitness tracking not included). - Country of Origin : Proudly manufactured in China. Key Features : - Soft and Breathable : Our Whoop 4.0 strap is crafted from ultra-soft, skin-friendly silicone that is flexible, sweat-resistant, waterproof, and lightweight, making it perfect for daily wear and active lifestyles. The skin-friendly metal buckle adds a smooth touch, preventing skin irritation. - Adjustable Size : Featuring durable hook and loop fasteners, this band ensures a secure fit for wrists measuring 5.9" to 8.26" (150mm-210mm). Ideal for both men and women, it complements any style. - Safe and Secure : The innovative design allows for easy alignment of holes on both ends, ensuring a precise and secure lock with your tracker. This feature prevents the tracker from falling off or becoming loose—no tools required. Practical Applications : - Perfect for various occasions such as workouts, casual outings, vacations, or even while sleeping. - A thoughtful gift for family and friends on special occasions like birthdays, Christmas, Valentine's Day, and Thanksgiving. Experience the perfect blend of comfort, style, and functionality with our Whoop silicone loop bands, designed to fit seamlessly into your active lifestyle.