When deciding what items to take to your spa hotel, think practicality and comfort. Casual, loose-fitting clothing is ideal. Along with robes, most hotels supply slippers on arrival. However, if you're taking a fitness or yoga class, pack your favorite trainers. Hoping to reset and recharge in the hot tub or hit the sauna? Swimwear is a must. While spending all day lounging around in very little can be blissful and fun, be mindful that there may be a minimum dress code for the restaurant if you're at a first-class resort. Pack a smart outfit in your bag too — just in case.