For the hip baby not afraid to sport black and white... Or great as a neutral gift when you don't know if baby is boy or girl. These blankets are made with a unique cotton called Muslin. The light, open weave of natural fibers allows air to flow seamlessly through the material - which lends to the ability for baby's body temperature to adjust naturally. These swaddling blankets / wraps will allow you to safely swaddle your baby, giving you confidence that your baby will experience a peaceful and secure sleep. And the best news is that the blankets can be used in many ways after the swaddling days are over (as shown in celebrity shots above!) - sun protection at the beach, stroller cover, comfy blankie, etc. And they get softer and softer with each wash. Each pack includes 4 black/white cotton muslin wraps (47 inches x 47 inches_).