How to dress baby in winter: All your options for keeping them warm Today's Parent The Car Seat LadyBest Winter Gear that is Safe in the Car Seat The Car Seat Lady Winter Coats and Car Seats: An Unsafe Mix FamilyEducation Winter Weather: Keep Babies And Toddlers Safe Franciscan Health Winter coats add bulk around your child and prevent a snug car seat harness. Harness straps must be in contact with your child, not a coat. Always strap, then wrap when harnessing