No I am not saying we should buy actual adult size onesies. I am talking dresses and rompers here. I looove dresses and rompers because they are like fashionable onesies. Putting on one article of clothing that can make a whole cute outfit just sounds freaking genius to me. All you need are shoes, accessories, and BAM a cute outfit. They can be dressed up or dressed down from casual to a more dressier occasion. A few years back I took a trip to Los Angeles, CA and I packed nothing but sundresses. Easy Peasy. If your not a dress girl then rompers are great alternatives. You can pack long jumpsuit ones if you prefer pants or the short ones if you prefer shorts. Got a 3-7 day vacation? Pack 3-7 dresses and/or rompers and two pairs of shoes along with matching accessories that can take those onesies from day to night and your good to go! Just dont forget to pack underwear and toiletries.