DOG VEST HARNESS IS A GOOD COMPANION FOR PETS Day or night,with a safety dog vest,your outdoor adventure with your pet becomes pure fun PRODUCT DETAILS 4 ADJUSTABLE BUTTONS Four Buttons adjust the size of the vest, making it more comfortable for pets to wear and not fall off. EASY TO CONTROL HANDLE Rear handle for better control and protection of pets How To Put On And Adjust Your Dog Harness Unbuckle the chest straps and loosen the neck straps,Slide the neck loop over your dog's head.Arrange the bottom straps between your dog’s two front legs, under the belly. After properly positioning the dog harness on your dog's body,buckle both side buckles up.Use the 4 adjusting straps (2 around the neck,2 around the chest) to adjust the dog harness.Slide the adjuster and pull/push the straps through the adjuster to create a good fit. (NOTE:When the dog harness is well adjusted,you should be able to fit 2 fingers between the harness and any part of your dog's body.The dog harness should fit snugly without restricting your dog's movement.If you can fit more than 2 fingers in,the dog harness may be too large.) refers to the minimum chest position.To tighten the chest straps,Feed the straps through the sliders,bringing the sliders all the way to the side buckles,until they reach one another. refers to the maximum chest position.To extend the chest straps,Hold the slider with one hand,and then pull down on the strap.Adjust until reach the required size. Note: Please measure your dog carefully and refer to the size chart before purchasing.