A tiny person being born in Oslo might needs some warm clothes, and specifically close to the body. I am no fan of synthetic materials close to the body- so all I knit is in wool, silk, cotton, alpaca or mix of those qualities. I have knitted three short sleeved underwear of Wool silk blend. The pattern is from Design.club.dk and called "Baby in rib" I just added the arms to the pattern.
Then i made two with long sleeves. One of them has beautiful buttons I got from a colleague.