"The maximum concentration of ""X100"". The carbon material gives the neck a heavy impression. The ULTIMATE PERFORMANCE GEAR combines the best performance performance and design. The top is made of carbon material for a quiet shine and is made of durable 66 nylon. It supports you to improve performance from your neck with a heavy impression. Material: Cord (side fabric): 66 nylon, (middle core) elastomer, Clasp: Stainless steel, carbon Size: 19.7 inches (50 cm) / 6.5 inches (16.5 Clasp Color: Silver Technology: Aqua Titanium X100, Micro Titanium Ball"