This harness fits small dogs and cats only. Measure your pet s widest chest before ordering size up if between sizes and do not rely on weight alone. It features a step-in design: place front paws in the holes, fasten the magic tape, secure the quick-release buckle, and attach the leash to the D-rings. Made of high-density soft air mesh, it is breathable, lightweight, comfortable, sturdy, easy to clean and quick-drying, keeping pets cool during walks. 360degree(s) reflective stripes improve low-light visibility, while the no-choke design evenly distributes pulling to protect the throat. A side D-ring is for Id tags or Led lights. The included leash has a padded handle, a D-ring for a poop bag holder, and is easy to carry. Sizes: Xxs (Chest 10""-11.5""), Xs (11.5""-13.5""), S (13.5""-15.5"")