Stoic Powerlifting Prong Belt (10mm)The 10mm single prong is the standard for serious strength training. Full grain leather throughout not a layered construction with suede filler, not a veneer over composite material. Every millimeter of thickness is structural. Four inches of width all the way around with no taper, so your entire midsection has a rigid surface to brace against. The 10mm is the right choice for most lifters doing real squat and deadlift training. It breaks in to your