Whether you're a good swimmer or an inexperienced swimmer, you should always wear a buoyancy aid. Neoprene wetsuits and waterproof clothing come next in importance. On a hot summer's day you can manage with less gear, but in cold weather or when the rapids are choppy, it's a good idea to dress for all eventualities and keep your spare clothes with you, packed watertight. Remember to protect yourself from the sun too.