When it comes to clothes, it will depend on which season you intend to travel. The summer months are long hot days and nights. With little to no humidity, the air is dry. So, it is important to pack clothes to keep you comfortable as possible. Loose long cotton dresses, skirts, kaftans, and any non-tight baggy clothing will be optimal, to combat the heat and respect religious norms. Make sure they are of a lighter shade as well; whites and pastel colours are great as they absorb less heat than darker hues. A scarf is also good when sightseeing in Abu Dhabi; for instance, when you visit mosques and other places of religious significance.
One-piece swimsuits are preferable while relaxing on the beach and in hotel pools. Bring along some coverups like a sarong or dress shirt to cover up once out of the water. A sweater will also be useful; this is because indoor air conditioning is typically on full blast to combat the heat. When it comes to footwear, open-toed sandals or slippers will be great. However, bring along a pair of good shoes if you intend to go on desert safaris or treks.