Most people would agree that a strong neck is necessary for playing physical contact sports. But that s not all a skinny neck can let down your physique & ruin symmetry. In boxing a strong neck can prevent you from being knocked out. These comfortable & well made Neck Slings are the best apparatus for developing powerful thick neck muscles fast. You won t believe the workout you get using this product. Adjusts for every head size. Be careful start on a light weight