i use 2 belts. just for everyday lifting a nice leather belt so i dont get a hernia, since they are hereditary in my family (my dad and all 4 of his brothers have or had them). for my heavy squat, bench, and deadlift i like the 10 mm lever belt, but its like $80. you can tell the difference in a heavy squat from the leather to the 10 mm lever belt. the lever belt is a lot stiffer and gives excellent lower back support with heavy loads.