Footie's practical hidden 2-way zipper with an inner placket to protect your baby's skin opens from neck to foot. It has mitten cuffs on sizes N (newborn) and 1 month to prevent scratching, and has an anti-slip feature under the feet on sizes 3 months to 9 months. The back of the foot has a soft elastic to ensure that baby's foot stays where it belongs! The fabric is the softest Tencel™ which is not only lightweight, breathable and hypoallergenic, its production process is sustainable, helping to minimize environmental impact.