How do you dress your baby when going out?

How do you dress your baby when you go out? Like going to air conditioned places like shopping malls/ church etc. My baby is coming to 2 months and we usually put him in air con room 25 degrees at home so he is used to this temperature. Is short sleeve romper with short pants plus booties sufficient? Or must wear long sleeves and long pants? Or better to layer? Do you still cover with swaddle (not wrapped, just cover legs like a blanket) when inside stroller? #advicepls