The main goal is practicality and comfort while you're staying at a spa hotel, so casual, loose-fitting clothing is the choice of attire for most guests. While you'll likely spend much of your time dressed in a fluffy robe and slippers, these are often supplied to guests when they check in. If you'd like to take advantage of the resort's fitness facilities, pack your workout gear and trainers. Hoping to relax in the pool or hot tub? Be sure to throw a swimsuit in your bag. In addition to toiletries and other personal effects, bring a change of clothes too. It's good to have something dry and clean to slip into after an oil massage.