The primary goal is comfort and practicality while you're at a spa hotel, so casual, loose-fitting clothing is recommended. While you'll likely spend a lot of time wearing little more than a fluffy robe, these are often issued to guests when they arrive. If you plan to use the resort's exercise and fitness facilities, pack your gym gear. Hoping to kick back and relax in the pool or steam room? Make sure you pack your swimming suit. In addition to toiletries and other personal belongings, bring a change of clothes with you too. It's good to have a fresh outfit to put on after a massage or body scrub.