If you want to create the illusion of a slim waist it could be easily done by tightening the dress with a belt, over jeans a kaftan made of any fabric looks great and this style is preferred by most teenagers today. One can wear it with sunglasses and a pair of sandals to get that beachy look while on vacation, it goes with any kind of accessories. You can easily shift to formal by changing the colors and fabrics
Even our moms love to wear cotton kaftan loungewear at home it works great as sleepwear and it is comfy as well. Simply choose a design you prefer, and make sure the fabric is natural to keep your body fresh perhaps in sunny temperatures.