Yosoo 44LB/ 20KG Adjustable Weighted Vest Workout Exercise Boxing Training Fitness (Weights not Included) [You Need Weighted Vest for Efficient Exercise] The intensity of weight-bearing exercise is higher than that of no-load exercise, which can improve the metabolic rate, so it has better effect on reducing fat and increasing muscle [No Need To Worry Unevenly Distributed Loads]The dual straps hold it very securely and lock it down pretty good so the weight stays evenly distributed and doesn't jostle around and messes with your balance while exercise and training, such as running and jogging [Widening Shoulder Design Release Shoulder Pressure]: Maybe you have issue like this"I felt that at the end of the day my shoulders would hurt more than they should, and it also prevented me from working out effectively" [Choose How Heavy You Will Bear]: With 16pcs pouches for loading sand or steel plate gives you the freedom to choose how heavy it will be...at least in increments. If you are patient and work your way up to the maximum weight it works much better than jumping right to the heaviest. [What You Get]: 44lbs workout weight vest with 16pcs pouches, Length: 60cm / 23.6in ; Width: 42cm / 16.5in ; Max loading: 20kg (when loading steel plate), 10kg (when loading sand). Yosoo worry free guarantee friendly customer service Not included sand or plate, the item is an empty weights without weights. so you may have to buy the weights yourself. Shoulder straps are not adjustable, just the straps around the mid section are. With the decent quality materials high-density thickening oxford fabric, designed for comfort and durability, it will help you for physical fitness, losing weight, slimming, exercising agile. Highly flexible compressed sponge interlining, for protection and shock absorption