Soft against the skin these merino wool thermal baby long johns are the perfect way to keep warm and cosy this winter wool is a natural way to regulate body temperature as it breathes wicking moisture away from the skin keeping baby happy warm and dry perfect as a first layer in colder weather loops in the fabric allow air to circulate 100 merino wool makes the garment strong and durable seams sewn flat for extra comfort longer at the back to keep lower back warm