85% Nylon, 15% Spandex. Zipper closure. Made of Stretchable soft fabric. Comfortable and breathable. Mock neck, long sleeve, back zipper from neck to waist, one-piece bodysuit. It's a unisex design both for men and women. It's not see through at all even though it was stretched quite a bit and the zipper is nice and doesn't get stuck easily. Perfect for Halloween costumes, stage performances, dancewear, practice, etc.