This Long Sleeve Turtleneck Onesie is made with 100% Pima Cotton, a premium fabric ideal for baby and child clothing. It is all natural, hypoallergenic, and will soften with each washing. Quality is a top priority, as only the best fabrics should grace their delicate skin. * 100% Peruvian Pima Cotton * Gentle machine wash cold, low heat dry - becoming softer each time!