Moved him to a duvet at Christmas and my son moved about loads and often kicks it off x
We still use sleep sacks, and will while she’s in her cot. When we move to toddler bed, I’ll do duvet then. Approx 2.5yr, I’m guessing.
My little one is in a slumbersac sleep bag with feet will try a duvet when he’s out of his cot.
We are transitioning out of sleep bags since it’s heating up so even if he kicks off the blanket, he won’t be cold! (I hope!)