Hi angel pants, congrats on your twin girls - you are in for a roller coaster! My girls were born at 37w5d and 2.5kg each. When they were that little, we used prefolds and covers from the time we got home and they were brilliant. Once they grew out of the smallest size, we were pretty much good to go on our ofsm. Cloth nappies on twins was nowhere near as hard as people assumed it to be, my girls were in cloth probably 95% of the time. Good luck