Taking a trip to a spa hotel is about relaxing and switching off from the real world, so pack clothes that are comfy, light and easy to wear. Sweatshirts and tracksuit pants are perfect. Robes and slippers are popular spa attire, but these are usually provided by the hotel. Planning on going for a dip in the swimming pool or doing a few exercise classes? Squeeze some gym wear, trainers and your bathing suit in your bag too. If your hotel has a restaurant on-site, check if there's a dress code — you may need to take something stylish to wear for dinner.