OK, so it’s a gift from someone with an astute understanding of the wants and needs of modern womankind. Certainly it’s a gift from someone who knew that what we really, really wanted was an item of clothing that made us feel secure. The proof of its appeal is in its longevity. If the white trainer (gloriously comfortable, gloriously versatile) is the shoe of the decade then the all-in-one is its equivalent, with the item no longer a novelty trend but an established category that’s considered as critical to retailers as dresses and skirts.