Comfortable: Made from 100% buffalo hide leather, the weight lifting belts are designed to be soft, supple, and flexible so they can help eliminate any pain, yet remain super supportive. High Quality: Produced with expert craftsmanship, each gym belt is 4mm thick and 4" with reinforced stitching and a double-tongue buckle that is sturdy enough to always have your back. Strong: Our weightlifting belts for men and women leather don't break, tear, or wear out. Enhances workouts while providing safe protection for your spine and core. : With the right thickness and width, our weightlifting belt allows for extra power, strength, and support in your back or abs to help improve your lifts by 10% on average. 600 Limit: Allowed you to squat or deadlift well over 500 and 600 pounds without issues.