Gap’s first-ever pet collection combines timeless American style with high-quality, comfortable essentials designed for you and your pet. Exclusively at Walmart. The Pink Size Extra Small Gap Striped Henley Pet Sweater is great for taking your dog or cat's daily walks in style and comfort or just lounging around the house. The pullover-style fits easily over your dog or cat's head for a snug and comfortable fit. This sweater is made from a 50/50 blend of recycled polyester and acrylic. Perfect for any occasion and all day wear!