Comfy base layer baby top is perfect for wearing as a first layer on colder days in soft merino wool its comfortably lightweight yet provides good insulation to keep them warm it also breathes exceptionally well and readily absorbs and releases moisture to keeping baby warm without overheating designed to be worn as either a base layer or every day wear making a perfect nursery top machine washable naturally regulates body temperature longer at the back to keep lower back warm flatloc