GoFit"s 10lb Adjustable Walking Vest is great for adding weighted resistance to your walking program whether outdoors or at home on a treadmill or elliptical. The vest is light gray & has reflective stripes on the front & back for added safety when outdoors. The dual closure system allows the vest to be worn snug with minimal movement or discomfort. Weight packets can be easily removed & replaced to adjust the weight down to 1lb is desired. The removable water bottle holder secures to the back with Velcro & is easily removed & replaced while in motion. Most MP3 players will easily fit in one of the inside neoprene pockets, too!