An extra cuddly collar makes this romper extra special. MEDIUM-WEIGHT INTERLOCK (Interlock is 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. HANDCRAFTED IN PERU.