Our long-sleeved Bow Romper is Feather Baby's bestselling silhouette, with an elastic collar that easily opens wide to slip over the baby's whole body. LIGHT-WEIGHT INTERLOCK—a knitting technique that sandwiches 2 layers of jersey and results in a smooth surface on both sides, inside and out. 100% Pima Cotton—with the longest cotton staple in the world, Pima cotton is luxuriously soft, washes great, never pills, hardly fades, and lasts practically forever.