The Peekaru Original is a fleece vest that zips over a soft baby carrier to keep you and your child warm. A perfect accessory to your favorite baby carrier. It fits comfortably over all baby carriers, including Baby Bjorns, Hotslings, Ergos, Mei Tais, and Wraps. Fall, Winter and Spring, the PeekaruTM works wonderfully under your winter coat in the snow. Nothing but soft fleece touching your baby. Please note that the Peekaru Original should not be worn with a child in the cradle or side laying position, as your babies head needs to be out of the baby head opening in order to insure proper oxygen flow.