A pet harness is a device designed to secure a pet, typically a dog or cat, while allowing for comfortable movement. Unlike collars, which can put pressure on a pet's neck, harnesses distribute weight across the chest and back, reducing the risk of injury. They come in various styles and sizes to accommodate different breeds and activities. Harnesses are often used for walking, training, or traveling, providing better control over the pet. Many harnesses feature adjustable straps for a snug fit and may include reflective materials for visibility. Some are designed for specific purposes, such as service animals or hiking.