TONIC SAUNA BIKINI TOP, BLACK COLOR WITH BLACK BORDERSingle layer to make it comfortable and breathable in sauna. White border for that special touch of elegance. 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 Braverman, we created the TONIC SAUNA