When deciding what to bring with you to your hotel, think functionality and comfort. Casual, loose-fitting clothing is a perfect choice. As well as bathrobes, lots of hotels supply slippers. However, if you're taking a fitness or yoga class, pack your comfy trainers. Hoping to soak your body in the steaming hot tub or enjoy a splash about in the pool? A swimsuit is a must. While spending all day wearing practically nothing can be blissful and fun, keep in mind dress codes may apply if you're at a first-class resort. Put a nice outfit in your bag as well — just in case.