Stable rugs are suitable for use in stables, boxes and during transport. Since they are not waterproof, they are not suitable for outdoor use. Barn ceilings should be breathable and have a top surface that does not allow straw or chips to stick to. If your horse is shorn or is a bit older or sick, you can make cold nights more comfortable for him with a stable blanket. Make sure that it is a good fit so that your horse can move and lie down without restriction.