COASTAL Harn Mesh Cat Comfort Soft Adjustable Mesh Cat Harness, red, size: XS. Adjustable cat walking harness for a custom fit on your cat. Comfortable cat harnesses are constructed of a lightweight polyester blend material that is breathable. Harness features a tough plastic buckle along with n adjustable plastic chest slide. Heavy-duty stitching for sturdiness and a metal D-ring for attachment of leash or lead.