There's No Such Thing as Bad Weather: A Scandinavian Mom's Secrets for Raising Healthy, Resilient, and Confident Kids (from Friluftsliv to Hygge)

by Linda Åkeson McGurk

The mid-layer insulates the body by trapping body heat in pockets of air in the fabric. This layer can be made of either natural or synthetic fibers and can, for example, consist of a fleece jacket and pants or a sweatshirt and sweatpants.