If you're taking your bike away on holiday, a bike bag or case is the perfect way to keep it safe and stop your other gear getting covered in oil. A bike bag is light, easy to store and great value. Look for one with padding all around the bike to offer good protection. Generally speaking, a bike bag is sufficient for airline travel within Europe when you're taking a direct flight. If you're flying further afield or if your bags are going to get transferred, a hard case is a safer option.