Hi, I have a baby the same age. We swaddle her in a cot sheet with a deep fold along the top so she can still move easily, but she loves being wrapped. I am starting to wean her off the wrap by wrapping in one arm only and then after a few weeks you leave both out and wrap from their armpits down. Sort of like a sleeping bag, but a snug fit and in summer if she still likes it, you can use muslin. Saves buying a sleeping bag till next winter...