This highly durable, marine-grade silicone wristband enables you to use the xFOB at your wrist, so it's always on and never intrusive. The xFOB fits perfectly inside the wristband.• Choose your favorite color• xFOB fits inside the wristband• Comfortable fit and adjustable size• Unique, patented locking mechanism• Highly durable silicone rubber• Size: Wraps from 5.3" to 8.5" circumference Highly durable silicone rubber Fits wrists from 5.3" to 8.5" cir. | xBAND For Use With MOB+ System xFOB, Black