Wahoo TRACKR Heart Rate Replacement Strap XLStay Strapped This extra long heart rate strap is compatible with the TRACKR HEART RATE MONITOR. The soft, elastic material minimizes the chance of chafing and is easily hand-washable. The two-snap connection is simple to get on and off, and the adjustable strap length gives you a secure, reliable fit. Features XL version is adjustable from 29" to 40"Sweat-proof and handwashable Two-snap connection that is simple to get on and off | Wahoo Fitness | Wahoo Trackr Heart Rate Replacement Strap Xl Black