The main goal is being relaxed and comfy while you're at a spa hotel, so loose-fitting, casual clothing is generally encouraged. While you'll likely spend a lot of time in toweling slippers and a robe, these are often issued to guests when they arrive. If you'd like to take advantage of the exercise facilities, pack your sports gear. Hoping to release some tension in the pool or steam room? Don't forget to pack your bathing suit. Along with toiletries and other personal effects, bring some spare clothes with you too. It's always great to have a fresh outfit to put on after a massage or body treatment.