Envelope neck for easy dressing Short sleeves for warmer temperatures, also great for layering when it's cold CPSIA approved for safety and comfort 65% polyester 35% cotton interlock knit for screen printing, embroidery, applique & sublimation Short sleeve pastel onesie bodysuits for babies and infants are unisex/gender neutral and ideal for spring, Easter or welcoming a new baby. Buttery soft polyester cotton blend provides the perfect stable surface for screen printing, HTV (heat transfer vinyl), DTG (direct to garment), iron-on, Cricut, etc.