Motorcycle Rain Trousers On tour without rain trousers? Unthinkable for any biker who prefers leather gear! And equally if you wear rain trousers over textile clothing, you will appreciate the additional protection against the wet and wind chill. At Louis you will find rain trousers to suit every taste and style. Tip: When you try on a suit, check that the legs are also long enough in the sitting position on your motorbike. If you're in any doubt, you can order two different sizes from Louis online and try them out. Louis will take back any item that does not fit or which you do not like.