Fewer decisions, fewer things to lose
A one-piece removes two problems at once. There is nothing to coordinate, and there is no second garment to go missing at nursery. For a baby who is crawling, a romper also stops the whole business of a top working its way up to the armpits every time she moves. Then there is the day it has to survive. Outdoors, the car, the pram, a meal, the floor. A romper takes all of that in one piece, which is why they end up being the thing you reach for without thinking.
The fabric is doing the other half of the work. Bamboo lyocell breathes and moves moisture away from the skin, which is what you want when a morning in Dubai or Sharjah involves 45 degrees outside and air conditioning at 20 inside, on repeat, three or four times before lunch.
She stays comfortable across the swings rather than arriving home damp and unsettled, and that swing is behind more unexplained afternoon crying than most of us realise at the time.
Every romper, playsuit and bamboo one-piece here is OEKO-TEX Standard 100 certified against Product Class I, the strictest class and the one written for articles worn by babies and toddlers, so nothing harmful is sitting against her skin through all of that.