Your Pet Is Family. Phiten, the brand worn by millions of people around the world, is now available for our four-legged friends. Featuring Phiten’s Aqua-Titanium® technology, the Pet Series is designed with your dog or cat in mind. The Leg Sleeves are essential for any active pet. Not only does it provide warmth, but increased leg support for your cat or dog. So no matter where you take your pet, we guarantee it will be a walk in the park.