Joshua had slept with a sleeping bag since he was about a month old. he grew out of them so we went to use his baby duvet a couple of months ago. i have found that he wriggles out of his duvet and wakes up because hes cold but then wont go back to sleep so end up in bed with us. i have ordered a sleeping bag today as im desperate for sleep. the thing is his duvet is a 4tog but the sleeping bags only go up to a 2.5tog. ive ordered a 2.5og. when he sleeps with his duvet he has been wearing a vest,sleepsuit and then having his duvet. (it gets cool in our house at night) he seems nice and snug with what he wears. so my problem is what do i put him in when he sleeps in his sleeping bag? i know they have recommendations but it needs to be close to him sleeping in a 4tog duvet. do i just put him in a long sleeve vest then if hes cool put a little cover over him or do i put him in a sleepsuit and then his sleeping bag but not a vest under the sleepsuit.