A neck cover rug or neck cover sheet is a piece of horse clothing designed to provide additional protection to the horse's neck from insects, sunburn, and other environmental factors. It typically attaches to a fly rug or sheet and covers the horse's neck up to the ears. Neck cover rugs are usually made of the same lightweight, breathable fabric as fly rugs and sheets, with additional features such as UV protection and adjustable straps for a secure fit. They are a popular choice for horse owners who want to provide their horses with comprehensive protection against insects and sunburn during the summer months.