GWELL Womens Floral Print Vintage One Piece Swimsuit Halter Neck Monokinis This swimsuit is padded up and wireless.and waist is special designed to make you much slimmer. Material:Polyester Fiber&Spandex Please choose a size up than your regular size according to our costomers feedback,for example,if you choose M size after reading our size chart,it will be better to choose L.Thank you for that. Adjustable halter neck Machine wash or hand wash are both okbut it will be better to wash this swimsuit in cold water since this will keep the item in good shape and quality.