This is an auto-lock belt equipped with phiten Aqua-Titanium. The central part of the back of the belt uses a material impregnated with phiten's Aqua-Titanium, which supports the mind and body to return to their natural state of relaxation. You can easily adjust the size in 5mm increments simply by passing the belt through the auto-lock buckle. To loosen or remove the belt, press the button under the buckle and pull the belt out. Since it's a hole-less belt, it's less likely to get damaged and can be used for a long time. Quality: Surface and Back: Synthetic leather Size: Total length 131cm, Width 3.5cm (Waist size up to 120cm is supported. Size adjustment can be easily done by cutting with scissors, etc.) Brand new, unused item. Large size Big size Long size XL Compatible The back of the belt body is sewn with a phiten tape impregnated with phiten's Aqua-Titanium technology. Just wearing it creates the natural relaxation effect of humans, supporting the alleviation of tension, harmony of mental balance, improvement of various ailments, and the display of stable performance. Enjoy a relaxed and comfortable golf swing when playing golf! Furthermore, the effect is enhanced by wearing it constantly.