90%Nylon+10% Spandex.Ribbed square neck long sleeve jumpsuits [Main Fabric] - This ribbed jumpsuits made with soft fabric.High elasticity, Comfortable, Breathable,The 4-way stretch to promote both compression and butt lifting, provide support to the upper leg muscles and reduce muscle vibrations [Thick material]-elastic yoga jumpsuits are very comfy to wear, designed with ribbed textured tummy control contours your curves and shape your body. thick enough non see through.