Sleep sacks for winter?

Shelly • Mama to 👦🏼 Jesse 6/4/19 & 👶🏻 Jameson 3/11/22

My son sleeps in a regular cotton sleep sack now. Wanting to get him some nice soft fleece ones or even the gunapod duvet sack? How do you guys dress your babies for bed in the winter or any recommendations? For now he’s wearing a long sleeved onesie, thin sweatpants, and socks under his sleepsack. We like sweatpants better than footie pajamas.