How to get them to actually wear a romper? Choose The Billie Long Sleeve Zip Romper. Made for daytime cuddles and quick changes. A full-length zip makes dressing easy, while the round neckline and full sleeves keep them covered with a cool cotton feel. The graphic print adds a fun touch, and the straight hem completes the look. Perfect for wriggly babies and all the bits of baby life that matter most.