This is a harness with a mesh lining. I tried it on, but the size was a little too small, so I haven't used it at all. I removed the tags. With the belt at its maximum, it fit perfectly on a 4.7kg Miniature Schnauzer with no gaps. However, it seemed tight under the armpits, and the dog froze. Therefore, I think it would be suitable for dogs smaller than that. Would anyone be interested?