When should I move my baby from a Gro-swaddle to a Grobag Baby Sleep Bag?

Once your baby is happy with under-arm swaddling, and is wanting to move around a little more in his sleep, this is an ideal time to start using a Grobag Baby Sleep Bag. The first size Grobag Baby Sleep Bag can be used from when your baby weighs 4kg (8.8lbs).