The Suteng Sports Adjustable Weighted Workout Vest is a versatile fitness accessory designed for strength training and weight lifting activities. Made with a durable black material, this vest can be filled with up to 30 lbs of sand (not included) to provide a customized resistance for workouts. Suitable for both men and women, this weighted vest is a great option for adding an extra challenge to your fitness routine and improving overall strength and endurance.