A nursing cover will not protect your baby from the elements. It is intended to shield you and your baby from prying eyes. These nursing covers are not waterproof and do not offer SPF-level sun protection. They can act as a germ barrier when used over a car seat or on a public seat for your baby such as a shopping cart. Some of them with thicker fabric might offer mild wind protection on a chilly day, but it would not take the place of warm clothing.