To use this two - in - one set, simply put on the babydoll with adjustable straps for a comfortable and perfect fit, and pair it with the matching thong. When it comes to care, remember to hand wash it and let it drip dry to keep it in good condition. Make sure to check the fit guide before purchasing to ensure the right size. Also, avoid using harsh detergents which may damage the 80% Polyamide and 20% Elastane material. Enjoy the romantic look and feel of this set!