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 *Please note that babies need sensory exploration and tactile stimulation every day, so be sure to leave little hands uncovered for a portion of the day :-) 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. Pairs perfectly with our cap and blanket for the ultimate take-me-home outfit. Chrome/lead/nickel-free zipper. Tagless for added comfort against baby's skin. Azo-free, non-toxic, eco-friendly dyes. Ethically made in India.