Playfetl...I use a Bye Bye Buggy so I can't really put anything under them...maybe I could tuck blankets into the seatbelts or something. We only have to go two blocks, so if you are dressed well, it isn't bad. My two kids were not too cold as they have good jackets, hats, and layers underneath. I have asked parents for scarves/neckwarmers and sweaters for under jackets. It just astounds me how parents dress kids in extreme weather as if it were a summer day (I had one show up in a shortsleeve T-Shirt today!!!!). I use my kids clothes when necessary as I won't let the kids suffer for their parents lack of thought.