Meet the Olivia Pajama Set. Drawstring pants, henley top, soft and stretchy cotton… need I go on? We combined all the design details from our best–selling pajama sets over the years to create the one and only Miss Olivia. Olivia is a long sleeve t-shirt and pants set made from the softest, organic cotton interlock fabric – the same fabric we use in our baby products, so you too can sleep like a baby.