LO has never been swaddled past the first week of his life & we've never used a sleep sack. He's 7.5 months old.
He doesn't sleep well unless one of us is beside him, which is fine for night time sleep (since he still wakes 1-2 times on an ideal night & we co-bed) but for naps (still on 3 a day) is getting a bit annoying.

Do you think it's too late to start using a sleep sack? One of the reasons we stopped swaddling is because he hated it & wanted his arms free...