Smooth flatlock seams, zipper with protective tab For safety, sleepwear should be either flame resistant or snug-fitting, this item is snug-fitting An Amazon Brand Responsibly made, certified free from over 100 harmful chemicals by Oeko-Tex Standard 100 Hand-me-down lasting quality Amazon Fashion has partnered with Hanna Andersson to create Moon and Back by Hanna Andersson, an Amazon-exclusive brand designed with premium fabrics, lasting quality, comfort, and care.