Dooradar Cat Harness and Leash Set, Escape Proof Safe Adjustable Kitten Vest Harnesses for Walking, Easy Control Soft Breathable Mesh Jacket with Reflective Strips for Cats, Green, SSize Reference XS (Neck Girth: 8. 5 11, Chest Girth: 13. 5 16), S (Neck Girth: 11 13. 7, Chest Girth: 18 20), Please measure your cat and refer to the size chart first before ordering. Your cat's head circumference should be at least 10 inches otherwise your kitten may slip out. If your cat is between sizes, please choose the smaller size. Super Soft & Breathable Material Made of lightweight, soft, breathable air mesh fabric, with soft edge and sponge