ATTENTION: Sizing does NOT directly correspond to your pet's breed or weight. Please MEASURE your pet by printing out our Size Guide which has a measuring tape and refer to our sizing chart for the best fit before ordering. ALL WEATHER MESH: Made with a soft, breathable air mesh, this lightweight pet harness is perfect for walks all year round. REFLECTIVE BANDS: Two reflective bands on the sides of this harness enhance your pet’s visibility for those early morning and late evening strolls. THREE SAFETY FEATURES: Our hook and loop fastener, buckle and double D-rings work together protect your pet in three layers of security. STEP IN, CLIP & GO. Step into your next walk in this simple and easy-to-wear vest harness. Click ‘Add to Cart’ now. Make every walk stress-free,Fuss-Free and effortless in the Step-In Air Harness for Dogs. Adjustment:Loosen all of the webbing straps on the harness.Put the harness on your pet.Adjust the chest strap.Adjust the neck strap.Make sure that you can still fit 2 fingers between the harness and your pet after adjustment