A pet harness is a device designed to secure a pet, typically a dog or cat, during walks or outdoor activities. Unlike collars, which can put pressure on a pet's neck, harnesses distribute the force across the chest and back, making them safer and more comfortable for the animal. They come in various styles and sizes to accommodate different breeds and body types. Many pet owners prefer harnesses for training purposes, as they provide better control over the pet's movements. Some harnesses also feature reflective materials for visibility during nighttime walks. Additionally, pet harnesses can be useful for pets with respiratory issues, as they reduce strain on the neck.