What is the difference between cork and leather?

The Gatsby harness comes in two materials - natural genuine leather, and vegan cork 'leather'. They are both equally supple and strong. The only difference between them is their water resistance. The leather Gatsby harness is splashproof, whereas the cork Gatsby harness can handle full immersion. So if your cat loves to swim or you live on or around water, we'd recommend opting for the cork Gatsby harness over the leather!