Warm liners
A high-quality regncoat should be made from a breathable material like nylon. Hot rubber jackets aren’t as breathable as nylon, but they can come in handy on short outings. A longer raincoat provides more coverage than a shorter one. Make sure you get one with a waist-length, though the ones covering the hips are hard to come by. Some raincoats come with liners while others don’t. Your child is better off in one with a liner for added warmth. If you choose the one without a liner, make sure they have a pullover underneath for warmth.