The belt is specially designed to attach your running number securely and conveniently. This avoids the use of safety needles that can damage clothing and provides easy access to the number during the race. The belt is made of elastic polyester, and can be adjusted to suit your size. This ensures a perfect fit around the waist without restricting movement or causing discomfort. The belt is designed to minimize friction and skin irritation. The seams and fasteners are designed to provide maximum comfort over long distances.