Layering baby

Jami-Lee
Just wondering how much clothing baby actually needs when sleeping. I know the tendency is to overdress. In the hospital baby was naked with diaper and then just double swaddled. I am trying out using woombies/peanut shaped swaddle sacks but unsure what to put underneath. Baby tends to be a warm baby so I was thinking a long sleeved onesie (no legs) with socks for underneath. It is winter here but our house is usually 70-72 degrees. Does anyone have any insight or have used these type of sleep sacks before?