Improve overall health and wellness in your dog with the XDOG Weight and Fitness Vest! The XDOG Weight Vest for Dogs is a high quality weighted vest for dogs designed to improve muscle, stamina and endurance by simply wearing it. Its unique design features: Removable and adjustable weight bags that can be filled with sand or BBs. Secure, snug fit (no loose rocking fit) using double straps. Comfortable and stylish material to wear. Front shoulder weight placement to help strengthen front legs and shoulders. Available 5 different sizes. View size chart below to help find your size. Great for: Improving muscle strength, high energy dogs, conditioning, endurance, toning, improving speed, combat obesity, & reduce anxiety.