When deciding what to take with you to your spa hotel, think comfort and practicality. Casual, loose-fitting clothing is ideal spa attire. As well as bathrobes, many hotels supply slippers. However, if you're joining an exercise class, pack some trainers. Hoping to soak yourself in the steaming hot tub or enjoy a splash about in the pool? A bathing suit is a must. While spending all day relaxing in practically nothing can be blissfully fun, a restaurant dress code may apply if you're at a high-quality resort. Bring something stylish to wear in your bag — just in case.