-About MAINTENANCE: Hand wash with warm water about 30degree. Do not soak for too long. Underwear is close-fitting and intimate clothing, which is easy to breed bacteria. For our health, it is recommended to change it every six months. -About SIZE: Fabrics of different materials have different elasticity, so different styles of the same size will have a little difference in tile size. Thank you for your understanding. -Our community There is such a group of girls who pursue fashion ,self-confidence and have their own unique insights on dress . They are energetic and enthusiastic,love sports ,and like a healthy and natural body .They are advocating freedom . Then FINETOO was born .Professional on design comfortable underwear for fashion girls . You deserve it .