LO will be 6-9 months old during the coldest part of the winter here. Overall, DC winters are pretty mild, but we have some very chilly days. Will I need some kind of bunting like this?

http://www.llbean.com/llb/shop/52109?pi=874355&bv=product-_-1138-_-RLP-_-IG97027-_-productname_link&qs=3000086