Love Handy Casual Maternity Nursing Paula Neck Winter Nursing Tops cotton95% span5% Elasticity  very good Machine Washable The clothing is specially designed for the convenience for nursing.Young Casual Maternity Nursing clothes It doesn't allow the breast feeding to be seen, which makes it very convenient for outdoor nursing. It also consist an elastic band, where it can be conveniently adjusted while breast feeding. Please note: size F is One size, Will fit for those who wear XSmall to Medium sizes