Heavy Duty Instructors BeltGalco makes their Heavy Duty Instructors Belts from heavy SCUBA nylon webbing for strength rigidity and durability. They have multiple rows of stitching running the length of the belt that contribute to vertical rigidity, making this a great choice for carrying a holster. The belt remains horizontally flexible for comfort, and has a drop forged parachute spec buckle. The hook and loop Velcro closure allows adjustment for a perfect fit.