Black & Yellow Maternity Tee Set. Add a comfy-as-can-be base layer to your wardrobe thanks to this cotton-blend tee set designed with a just-right hint of stretch. Â Size note: This item is from a European brand. Please refer to the size chart for best fit. Â Includes one black and one pink tee 98% cotton / 2% elastane Machine wash; tumble dry Imported Shipping note: This item is shipping internationally. Allow extra time for its journey to you.