GOTS certified 100% organic cotton body-hugging fit to surely become your favorite outfit for any occasion/outing fold-over, mitt-sleeves (in sizes preemie/nb, 0-3m, and 3-6m) for added warmth and protection from self-scratching rubber-dotted grip soles on all sizes to prevent slipping thoughtfully designed with elastic on back of ankles for a stay-in-place fit ankle-to-neck zipper (up one leg), with zipper pocket at ankle for safety and comfort small zipper tab cover at neck for added comfort chrome/lead/nickel-free zipper tagless for added comfort against baby's skin azo-free, non-toxic, eco-friendly dyes