What do your LOs wear? We live where it is COLD, and usually pretty windy too. LOs usually just wear Columbia fleeces in the car seat. In reality, that probably isn't warm enough...so looking for some thing, warmer, preferably wind proof-ish options for my two boys (currently almost 3 and 7 months. But would love to shop some sales for next season!) that is thin enough to still be safe in the car seat. Suggestions?!