7 A.M. Enfant brand car seat blanket. This blanket is specifically designed to be safe and compatible with infant car seats. We loved this blanket when our baby was little, it was an easy way to keep her nice and warm going from the house to the car. No need for bundling baby into sweaters and jackets, just buckle into car seat and wrap the blanket around the baby. $20 ($59 new) https://www.amazon.com/M-ENFANT-Nido-Teal-Small/dp/B01MZ0XMUL/ref=sr_1_fkmr0_2_a_it?ie=UTF8&qid=1501170141&sr=8-2-fkmr0&keywords=7%2Bam%2Benfant%2Bcar%2Bseat%2Bcocoon&th=1