lt;pgt;Compatible Modelsamp;#65306; this sport silicone loop bands are compatible with Whoop 4.0amp;#65292;compatible band is wrist wearing ONLY , its not for bicep wearing. Soft, Breathable amp;amp; Lightweightamp;#65306;Our whoop 4.0 strap is made of ultra soft silicone,skin-friendly,flexible, sweat-resistant, water-proof, breathable,lightweight and durable. with skin-friend metal buckle give your wrists a comfortable silky touch of milk, prevents skin from irritation; which feels comfortable next to your skin, Our whoop 4.0 strap for women men perfect fits vacation,sport,daily,date or sleep. Safety Buckle Designamp;#65306;Simply align the holes on both ends and with a single tap, lock accurately and securely on your whoop 4.0 tracker interface, Prevents trackers and straps from falling off and becoming loose. No tools needed. Adjustable Size Designamp;#65306;The whoop bands are designed with sturdy hook amp;amp; loop fasteners, easy to adjust the band to fit your wrist and wearing firmly. Silicone fashion design fit for all stylish women and men. Suitable for 5.9amp;lsquo;amp;rsquo;-8.26amp;lsquo;amp;rsquo;(150mm-210mm) wrist. It is suitable as a special gift for family and friends on birthdays, , Valentine's Day, Thanksgiving or holidays. Built for companionship: Whether itamp;rsquo;s professional sports, high-intensity workouts, water sports, or light exercise, daily fitness, routine, overnight sleep, this lightweight and breathable Whoop silicone band is your reliable companion.lt;/pgt;