Air Conditioned Rain Jacket – keep cool and dry even if the weather is not When it rains in the summer, rain jackets are just a big old nope. Sure they keep you a bit dryer than an umbrella and won’t betray you at a moment’s notice but all that dryness you gain you will lose by dripping sweat. Unless you have the Air Conditioned Rain Jacket, the rain jacket with an air con built right in.