TONIC BIKINI BOTTOM, BLACK COLOR WITH BLACK BORDERPerfectly fit style that is great for any body shape. Single layer fabric so that your skin can breathe while exposed to the heat of the sauna. Your body deserves better when exposed to heat. Most swimwear is made from polyester a petroleum based fiber that, under sauna temperatures, can release toxins absorbed through your skin. Its a quiet, invisible stress on your health. In collaboration with wellness advocate and devoted sauna user Dr. Joyce