Black Eclipse Bikini Brief. fabric. Very comfortable and sexy! sheer fabric 90% MicroPoly 10% Spandex. Don't forget the matching ! Sizing in inches: Small 27"-30", Medium 31"-34", Large 34"-38", XL 38"-42", 2XL 42"-46", 3XL 46"-50"(add $1 for 2XL/3XL) Style# 191107-H0701