Why Dogs Need a Life Jacket】Dogs are born to swim, a life jacket is just a helper for them. Don't leave dogs alone in the water even if they are wearing a life jacket. If this is your dog's first time wearing a life jacket to swim, please train them to adapt to their new vest and never leave them alone in the water 【How to Choose the Right Size】Before choosing a size, please measure your dog's back, chest and neck circumference, check the size chart in the product description carefully. If your dog is between the two sizes, please choose the larger size. 【BUILT-IN ERGONOMIC HANDLE】The built-in handle in our dog life jacket provides a simple and safe way to handle your dog and makes it quick and easy to guide your dog in and out of the water. 【Premium Materials】The dog life jacket is made of high-quality ripstop Oxford fabric, polyethylene foam and breathable nylon mesh. This dog safety vest is built with extra padding, up to 50% more flotation to keep your pup safe in the water;