Product Overview: This is a fitness accessory designed to provide core and lumbar support during heavy compound movements like squats and deadlifts. Brand: CAP Barbell. Material: Heavy-duty Nylon. Color: Black (BK). Size: Large (L), designed for an approximate 40-inch waist. Width: 4 inches, providing standard lower-back coverage. Closure: Hook and loop system (Velcro) for quick adjustments between set.