Breathable and stretchy fabric, and the lace material is soft and stretchy, which is perfect for a close fit also crotch less. The built in bra has a underwire for maximum support also the straps are adjustable. Occasion: Everyday Wear, Wedding Night, Honeymoon, Valentine's Day, Anniversary, Bachelorette Party, Boudoir Photoshoot, Club, Beach, Family, Sleep, Birthday, Bedroom, Lingerie Party, Christmas Holiday Party.