High performance weight vest allows full range of motion without restricting your breathing. The weighted vest is an awesome product if you want to add an extra challenge to your workout, increase strength and burn extra calories. Primarily used for resistance training, it can also be used to enhance the calorie burning effects of a cardio workout, increasing the rate at which you lose weight. Wear it on a run or walk, in the gym or even doing every day activities around the house. Great for young athletes looking to improve vertical jump and 40 yd time.